Title:

Principal Systems Engineer / Systems Architect – Modular Weapons GRA

Belong. Connect. Grow. with KBR!

KBR’s National Security Solutions team provides high-end engineering and advanced technology solutions to our customers in the intelligence and national security communities. In this position, your work will have a profound impact on the country’s most critical role – protecting our national security.

Why Join Us?

• Innovative Projects: KBR’s work is at the forefront of engineering, logistics, operations, science, program management, mission IT and cybersecurity solutions.

• Collaborative Environment: Be part of a dynamic team that thrives on collaboration and innovation, fostering a supportive and intellectually stimulating workplace.

• Impactful Work: Your contributions will help transform the existing weapon architecture into a practical Government-owned framework that expands the industrial base, increases competition, accelerates technology innovation, lowers integration and weapon-system costs, and enables production to scale more rapidly.

KBR is seeking a highly experienced Principal Systems Engineer and Modular Systems Architect to support a U.S. Government organization responsible for advancing the Weapons Government Reference Architecture (GRA) and Weapons Open Systems Architecture (WOSA) for conventional weapon systems. The purpose of this effort is not simply to produce a more complete architecture model. It is to extend the current architecture into an actionable Government-owned framework that enables a broader and more competitive industrial base, creates viable entry points for nontraditional and component-level suppliers, accelerates insertion of new technologies, reduces dependence on closed or vertically integrated solutions, lowers redesign and integration costs, and supports scalable production across a family of weapon systems.

Key Responsibilities

Serve as the principal systems engineer and architect for evolving the Weapons GRA and WOSA into an implementable framework that supports industrial-base expansion, supplier competition, technology insertion, affordability, production scalability, and Government control of critical technical interfaces and data.
Communicate detailed architecture, interface, SysML, and MBSE concepts with Government and industry engineers while translating the technical approach, tradeoffs, risks, and value into clear, decision-relevant terms for senior leaders and non-specialist stakeholders.
Architect and lead the Model-Based Systems Engineering (MBSE) effort needed to define the physical parameters, interfaces, constraints, attributes, and model-based severable data packages that make those outcomes possible.
Lead the effort to augment and refine the existing Weapons GRA framework so it can be applied across current and future Air Force conventional weapon programs to reduce unnecessary program-unique design, increase reuse, and create repeatable pathways for integrating qualified subsystem solutions.
Extend established WOSA domains to include parameters, constraints, interface characteristics, form-factor considerations, environmental conditions, and other attributes necessary to govern physical modularity.
Define the structure, content, technical requirements, configuration controls, intellectual-property boundaries, and acceptance criteria for model-based severable data packages that allow subsystem solutions to be competed, developed, evaluated, integrated, and replaced with less dependence on a single weapon integrator.
Develop architecture viewpoints, system models, interface definitions, requirements relationships, reusable model libraries, and reference patterns that provide suppliers with clear technical entry points while protecting system-level integration integrity.
Apply SysML and MBSE methods to maintain traceability among mission needs, requirements, logical architecture, physical architecture, interfaces, verification methods, and production considerations.
Evaluate how modular physical interfaces and severable data packages can support rapid insertion and competition of seekers, propulsion systems, payloads, mission electronics, guidance components, datalinks, power systems, and other domain solutions from traditional and nontraditional suppliers.
Identify architecture decisions and interface standards that reduce redesign, non-recurring engineering, integration time, qualification burden, supplier lock-in, production disruption, and total weapon-system cost.
Define architecture and data-package approaches that allow the Government to compete domain solutions independently where appropriate, without compromising weapon-level safety, performance, cybersecurity, airworthiness, or integration responsibility.
Identify where common interfaces and reusable architecture products can create sufficient demand across programs to attract new suppliers, justify private investment, and improve the business case for innovative technologies and expanded manufacturing capacity.
Evaluate the tradeoffs between standardization and mission-specific optimization to ensure modularity improves competition, affordability, and production flexibility without imposing unnecessary performance penalties or constraining future design innovation.
Define proof-of-concept efforts that demonstrate whether model-based severable data packages and physically modular domain solutions can reduce integration time and cost, enable supplier substitution, and support production scaling without unacceptable performance or qualification risk.
Assess architectures and models for completeness, consistency, interoperability, configuration integrity, usability, extensibility, affordability implications, supplier accessibility, and alignment with Government open-systems and industrial-base objectives.
Coordinate with Government program offices, technical authorities, digital engineering teams, test organizations, acquisition stakeholders, and industry partners.
Lead or support architecture reviews, model reviews, interface working groups, design reviews, and technical interchange meetings.
Deliver incremental architecture releases and demonstrate how each release improves technical clarity, supplier accessibility, modularity, competition, integration speed, affordability, or production scalability.
Deliver a final release package at the conclusion of the period of performance, including documentation, examples, and a reference implementation to support future Government modeling efforts applying the delivered architecture.

Work Environment

• Location: On-site, Eglin AFB, FL

• Travel Requirements: Low

• Working Hours: Standard work schedule; core hours 0900–1500

Qualifications

Required

Bachelor’s degree in Systems Engineering, Aerospace Engineering, Mechanical Engineering, Electrical Engineering, Computer Engineering, or a related technical field.
15+ years of progressively responsible experience in systems engineering, system architecture, digital engineering, MBSE, open systems architecture, weapon-system development, or closely related defense or aerospace domains.
Extensive hands-on experience applying MBSE principles and methodologies to complex DoW/DoD aerospace, missile, munition, or weapon systems.
Experience developing model-based severable data packages, modular technical data packages, interface-control models, reusable architecture libraries, or reference implementations.
Expert practical proficiency using SysML to develop, manage, analyze, and communicate system architectures, requirements relationships, interfaces, and model-based technical baselines.
Experience with both SysML v1 and SysML v2.
Experience translating physical constraints, mechanical and electrical interfaces, environmental conditions, form and fit considerations, modularity parameters, and verification needs into rigorous system models that can support competitive acquisition and subsystem integration.
Strong understanding of requirements development, functional decomposition, logical and physical architecture, interface management, configuration management, verification planning, and technical baseline control.
Ability to independently lead complex architecture and MBSE efforts, connect technical architecture choices to acquisition and industrial-base outcomes, and develop executable recommendations for Government decision-makers.
Exceptional ability to communicate complex engineering concepts to senior leaders while also conducting detailed technical discussions with Government and industry engineers.
Active Secret clearance

Desired

20+ years of systems engineering, weapon-system architecture, MBSE, modular open systems, digital engineering, or advanced aerospace and defense engineering experience.
Advanced degree in a relevant engineering discipline.
Direct experience with Weapons GRA, WOSA, or other DoW/DoD weapon-system reference architectures.
Demonstrated experience developing or applying Government Reference Architectures, open systems architectures, modular open systems approaches, or comparable architecture frameworks to improve competition, supplier access, technology insertion, affordability, or production flexibility
Experience connecting architecture decisions to industrial-base expansion, supplier interchangeability, second-source qualification, technology insertion, reduced non-recurring engineering, lower integration cost, production scalability, upgradeability, and rapid capability integration.
Prior support to a Government program office, System Program Office, chief engineer, digital engineering organization, defense prime, or weapon-system integrator.
INCOSE CSEP or ESEP certification.
OMG OCSMP certification at the Model Builder level or higher.
DAWIA Engineering certification at the Practitioner or Advanced level, or comparable Program Management certification.
Active Top Secret clearance or TS/SCI eligibility a plus.

Ready to Make a Difference?

If you’re excited about making a significant impact in the field of advanced weapon systems and working on projects that matter, we encourage you to apply and join our team at KBR. Let's shape the future together.

KBR Benefits

KBR offers competitive benefits and supports career advancement through professional training and development.

Belong, Connect and Grow at KBR

At KBR, we are passionate about our people and our Zero Harm culture. These inform all that we do and are at the heart of our commitment to, and ongoing journey toward being a People First company. That commitment is central to our team of team’s philosophy and fosters an environment where everyone can Belong, Connect and Grow. We Deliver – Together.

KBR is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, disability, sex, sexual orientation, gender identity or expression, age, national origin, veteran status, genetic information, union status and/or beliefs, or any other characteristic protected by federal, state, or local law.

About the company

KBR provides science, technology, and engineering solutions to government and commercial clients in aerospace, defense, intelligence, and energy. It operates in two segments: Government Solutions offers defense, space, mission, readiness, and sustainment services to agencies such as the DoD and NASA; Sustainable Technology Solutions sells proprietary technologies, equipment, and catalysts to help energy and chemicals producers manufacture ammonia, olefins, and other products more efficiently and with lower environmental impact. KBR differentiates itself by combining a strong government contracting footprint with in-house technology and equipment capabilities to deliver end-to-end programs. Its goal is to deliver reliable, cost-effective engineering and technology solutions that support long-term projects for both government and commercial customers while advancing sustainable industrial processes.

Company Size

10,001+

Company Stage

IPO

Headquarters

Houston, Texas

Founded

1919

Get referred to KBR

See people who can refer or advise you

Simplify's Take

What believers are saying

SABIC selected KBR on September 29, 2026 for a 3,500 MTPD Saudi ammonia plant.
Q2 2026 sustainable technology backlog hit $5.5 billion, up 40% year over year.
UK Ministry of Justice expanded KBR's five-year estate contract on August 27, 2026.

What critics are saying

NASA awarded COSMOS to Ascend in March 2026, removing a major incumbent account.
Q2 2026 revenues fell 2% and operating income dropped 11% from spin-off costs.
Trinzic separation leaves remaining KBR reliant on ammonia project cycles and Saudi execution.

What makes KBR unique

KBR licenses Purifier ammonia technology, deployed in 260-plus grassroots plants since 1943.
KBR's January 2027 Trinzic spin-off isolates a $5B mission-business customer base.
KBR combines technology licensing, engineering, proprietary equipment, and catalyst supply across projects.

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Benefits

Health Insurance
Dental Insurance
Vision Insurance
Life Insurance
Disability Insurance
401(k) Retirement Plan
401(k) Company Match
Paid Vacation
Flexible Work Hours
Professional Development Budget

Company News

Washington Technology

Oct 15th, 2026

DOD sets industry day to preview potential $80B tech research vehicle.

DOD sets industry day to preview potential $80B tech research vehicle. Stay Connected Find opportunities - and win them. October 15, 2026 12:25 PM ET The Defense Department is pushing to create a new "competitive R&D ecosystem" with government agencies, companies, academic institutions, laboratories and non-traditional entities all involved. The Defense Department has opened registration for an industry day to discuss its plans for the recompete of one of its primary contract vehicles for broad research-and-development services. DOD has penciled in Oct. 30 as the date for when it will give attendees an overview of the upcoming Next Gen IAC MAC competition, which will succeed the current IAC-MAC program that opened for business in 2018 at a $48 billion ceiling. Attendees will be able to provide feedback on DOD's approach to the acquisition and ask questions, the department said in its Tuesday notice with instructions for registration. Next Gen IAC MAC is poised to have a ceiling north of $80 billion, according to a promotional flyer for the event. Government agencies, companies, academic institutions, laboratories and non-traditional entities would be a part of what DOD describes as a "competitive R&D ecosystem" under the future contract. DOD first unveiled its plan for the follow-on to IAC-MAC, short for Information Analysis Center Multiple-Award Contract, in the spring of 2025 and asked for industry to weigh in on how the department could structure the recompete. At that time, the department said it was considering whether to set up Next Gen IAC MAC with two pools of awards or a single pool. The current contract has three pools based on the type of company involved: an unrestricted portion, a second for small businesses, and the third for nonprofit organizations. RSVPs and registration for the industry day must be received no later than Oct. 26. IAC-MAC primarily supports the Defense Technical Information Center, a DOD field activity responsible for helping the defense ecosystem preserve and share information and knowledge related to military technology. DTIC also operates the Information Analysis Center network that provides technical analysis and data support to service branches, combatant commands, DOD's administrative support agencies and senior Pentagon civilian leaders. DOD has obligated $16.9 billion in task order volume to-date via IAC-MAC ahead of its scheduled sunset in April 2028, according to GovTribe data. HII, Booz Allen Hamilton, KBR, the ManTech TSG-2 joint venture and CACI International are the top five recipients of the spend. Their combined obligations also represent the clear majority at 79%. KBR is in the process of spinning off its government services segment into a publicly-traded company, which will go by the name of Trinzic.

Yahoo Finance

Oct 1st, 2026

KBR appoints Rami Qasem to board ahead of $5B Trinzic spin-off

KBR announced the appointment of Rami Qasem to its board of directors, effective 1 October 2026. Qasem, 59, brings nearly 30 years of international leadership experience across energy, technology, and industrial sectors. He previously served as CEO of APEX Industrial Services and managing director of Energy Capital Group from 2025 to February 2026. From 2017 to 2023, he was executive vice president and CEO of digital solutions at Baker Hughes. Before that, he spent 21 years at General Electric in increasingly senior roles. The appointment strengthens KBR's governance ahead of its planned separation of the Mission Technology Solutions business in January 2027.

Associated Press

Sep 30th, 2026

KBR files Form 10 for $5B Trinzic spin-off, set to trade as TZIC in January 2027

KBR has filed a Form 10 registration statement with the US Securities and Exchange Commission for the planned spin-off of its Mission Technology Solutions business, which will operate as Trinzic and trade on the New York Stock Exchange under the ticker TZIC. The separation is expected to complete in January 2027. Trinzic will be a global provider of mission-critical solutions supporting national security, defence and space customers, with operations across over 60 locations in North America, Europe and Australia/Pacific. The company will launch with more than $5 billion in annual revenue and 18,000 employees. The spin-off is intended to be tax-free to KBR and its shareholders for US federal income tax purposes. Following the separation, KBR will continue operating its Sustainable Technology Solutions business with 15,000 employees across more than 40 countries. Trinzic will host its inaugural investor day on 12 November 2026 in New York City.

GlobeNewswire

Sep 29th, 2026

KBR ammonia technology selected for one of the largest fertilizer complexes in Saudi Arabia.

KBR ammonia technology selected for one of the largest fertilizer complexes in Saudi Arabia. HOUSTON, Sept. 29, 2026 (GLOBE NEWSWIRE) - KBR (NYSE: KBR) announced today that SABIC Agri-Nutrients (SABIC AN) has selected its Purifier(R) technology for a new grassroots ammonia plant in Jubail, Kingdom of Saudi Arabia. Under the terms of the contract, KBR will provide technology licensing, basic engineering design, proprietary equipment, and catalyst supply for a 3,500 metric tons per day (MTPD) single-train ammonia plant. KBR will work alongside EPC contractor Samsung E&A to deliver the project. The facility will produce 1.2 million metric tons of ammonia annually. The project is expected to increase SABIC AN's urea production capacity from 4.8 million to 7.4 million metric tons per year, supporting the company's strategy to expand fertilizer production. KBR's Purifier(R) configuration will enable lower carbon intensity per ton of ammonia produced compared with conventional ammonia process designs. The award represents one of the largest ammonia capacity plants licensed in the Kingdom and KBR's largest ammonia license by capacity in the Middle East and Africa. The project supports Saudi Arabia's industrial development objectives under Vision 2030 while strengthening the Kingdom's role in global food security through increased fertilizer production. "This award confirms the strength of our Purifier(R) ammonia technology and the trust that leading producers such as SABIC AN place in KBR to deliver reliable, high-performance solutions at world scale," said Stuart Bradie, President and CEO, KBR. "We are proud to support SABIC AN's growth ambitions and help expand fertilizer production capacity in the Kingdom while contributing to global food security." This award marks KBR's second large-scale single-train ammonia award of 2026, following a 3,430 MTPD plant in Latin America and further strengthens KBR's position as a leading provider of ammonia technology for large-scale fertilizer projects. Since 1943, KBR's ammonia technology has been deployed in more than 260 grassroots facilities, and the company continues to improve energy efficiency, emissions and plant performance through innovations including KBR INSITE(R), its physics-enabled AI advisor for smarter operations. About KBR KBR is a global, capital-light lifecycle solutions company serving customers in high-complexity industrial, energy and infrastructure markets. Through its advisory, technical, engineering and operating expertise, KBR helps customers shape investments, reduce risk, deploy complex technologies, improve performance and deliver reliable outcomes across the asset lifecycle. Following the planned separation of the Mission Technology Solutions business, KBR will operate as a focused standalone company with differentiated customer relationships, global execution capabilities and a capital-efficient business model. The company is positioned to benefit from long-term secular growth trends across energy security, energy transition, industrial modernization, and infrastructure investment. KBR's 15,000 employees operate across more than 40 countries. About Trinzic KBR's Mission Technology Solutions business is expected to be spun off as an independent public company in January 2027 and will then operate under the new name Trinzic. The name is inspired by the word intrinsic, reflecting the essential capabilities, deep expertise, speed and trusted performance that have defined the business for decades. Trinzic will enter the market as a global company and partner to customers supporting some of the highest priority missions across national security, human performance, global operations and space. Trinzic will launch with more than $5 billion in annual revenue, established partnerships and contracts, 18,000 employees and a global footprint. Forward Looking Statements The statements in this press release that are not historical statements, including statements regarding KBR's ammonia technology and related services, are forward-looking statements within the meaning of the federal securities laws. These statements are subject to numerous risks, uncertainties and assumptions, many of which are beyond the company's control, that could cause actual results to differ materially from the results expressed or implied by the statements. These risks, uncertainties and assumptions include, but are not limited to, those set forth in the company's most recently filed Annual Report on Form 10-K, any subsequent Form 10-Qs and 8-Ks and other U.S. Securities and Exchange Commission filings, which discuss some of the important risks, uncertainties and assumptions that the company has identified that may affect its business, results of operations and financial condition. Due to such risks, uncertainties and assumptions, you are cautioned not to place undue reliance on such forward-looking statements, which speak only as of the date hereof. Except as required by law, the company undertakes no obligation to revise or update publicly any forward-looking statements for any reason. For further information, please contact: Investors Rachael Goldwait Vice President, Investor Relations 713-753-5082 [email protected] Media Philip Ivy Vice President, Global Communications and Marketing 713-753-3800 [email protected]

GlobeNewswire

Sep 24th, 2026

KBR welcomes Chief Executive Officer of Trinzic, the spin-off of its Mission Technology Solutions business, and announces new Investor Relations lead.

KBR welcomes Chief Executive Officer of Trinzic, the spin-off of its Mission Technology Solutions business, and announces new Investor Relations lead. HOUSTON, Sept. 24, 2026 (GLOBE NEWSWIRE) - KBR (NYSE: KBR) is pleased to welcome Michael LaRouche on his first day as President and Chief Executive Officer-Designate of Trinzic, the planned spin-off of KBR's Mission Technology Solutions business. Michael will shape the strategic direction, accelerate growth and drive performance for Trinzic, which is expected to launch on January 4, 2027, as a publicly traded global company. Trinzic is backed by decades of experience on the highest-priority national security and space missions and will deliver technology-forward solutions to governments, partners and allies worldwide. "We're building Trinzic on an incredible foundation of deep technical capabilities, mission expertise and the trust of our customers," said Michael LaRouche. "We're building Trinzic on an incredible foundation of deep technical capabilities, mission expertise and the trust of our customers to perform when there is no margin for error," LaRouche said. "I'm excited to work alongside our talented teams around the world to shape Trinzic's future, with a shared focus on moving with greater agility, embracing innovation and creating even more value for our customers and shareholders." Trinzic will employ 18,000 engineers, scientists and other domain experts who are embedded in the programs they serve or stationed at the company's 60 locations around the world. LaRouche is based in the company's principal executive office in Arlington, Virginia. Trinzic's significant footprint in Washington, D.C. allows for close engagement with policymakers and enables collaboration with the Pentagon and intelligence community customers, helping them navigate complexity and make decisions with confidence. As an independent company, Trinzic will have more than $5 billion in revenue and a diverse portfolio spanning integrated air and missile defense, human performance, global operations, space exploration and space domain awareness. LaRouche will oversee the company's strategy and execution, drawing on three decades of experience gained through senior leadership roles at Serco, SAIC, Raytheon and Lockheed Martin. In anticipation of the planned spin-off, KBR also announced that Gabe Butler will join the company on October 5 as Vice President-Designate of Investor Relations for Trinzic. Butler brings more than 14 years of experience across program finance, investor relations and Financial Planning and Analysis (FP&A). He most recently served as Director of FP&A for the Government Operations segment at BWX Technologies and previously held finance and investor relations leadership roles at Leidos. Butler will play a key role in preparations for and execution of Trinzic's inaugural Investor Day on November 12 in New York City. Trinzic's executive leadership team will provide additional details on its strategic vision, growth strategy and financial outlook at the event. The planned spin-off is intended to be tax-free to KBR and its shareholders for U.S. federal income tax purposes and remains subject to customary conditions, including regulatory approvals and final approval by KBR's Board of Directors. Following the spin-off, New KBR will continue to be led by Stuart Bradie and will encompass the company's Sustainable Technology Solutions business. About KBR KBR is a global, capital-light lifecycle solutions company serving customers in high-complexity industrial, energy and infrastructure markets. Through its advisory, technical, engineering and operating expertise, KBR helps customers shape investments, reduce risk, deploy complex technologies, improve performance and deliver reliable outcomes across the asset lifecycle. Following the planned separation of the Mission Technology Solutions business, KBR will operate as a focused standalone company with differentiated customer relationships, global execution capabilities and a capital-efficient business model. The company is positioned to benefit from long-term secular growth trends across energy security, energy transition, industrial modernization, and infrastructure investment. KBR's 15,000 employees operate across more than 40 countries. About Trinzic KBR's Mission Technology Solutions business is expected to be spun off as an independent public company in January 2027 and will then operate under the new name Trinzic. The name is inspired by the word intrinsic, reflecting the essential capabilities, deep expertise, speed and trusted performance that have defined the business for decades. Trinzic will enter the market as a global company and partner to customers supporting some of the highest priority missions across national security, human performance, global operations and space. Trinzic will launch with more than $5 billion in annual revenue, established partnerships and contracts, 18,000 employees and a global footprint. Forward Looking Statements The statements in this press release that are not historical statements, including statements regarding the spin-off KBR's Mission Technologies Solutions business and future performance of SpinCo and KBR, are forward-looking statements within the meaning of the federal securities laws. These statements are subject to numerous risks, uncertainties and assumptions, many of which are beyond the company's control, that could cause actual results to differ materially from the results expressed or implied by the statements. These risks, uncertainties and assumptions include, but are not limited to, those set forth in the company's most recently filed Annual Report on Form 10-K, any subsequent Form 10-Qs and 8-Ks and other U.S. Securities and Exchange Commission filings, which discuss some of the important risks, uncertainties and assumptions that the company has identified that may affect its business, results of operations and financial condition. Due to such risks, uncertainties and assumptions, you are cautioned not to place undue reliance on such forward-looking statements, which speak only as of the date hereof. Except as required by law, the company undertakes no obligation to revise or update publicly any forward-looking statements for any reason. For further information, please contact: Investors Rachael Goldwait Vice President, Investor Relations 713-753-5082 [email protected] Media Philip Ivy Vice President, Global Communications and Marketing 713-753-3800 [email protected]

KBR

Principal Systems Engineer / Systems Architect - Modular Weapons GRA

About the job