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Who We Are: Founded in 2007, SimIS Inc. is an innovative information technology solution Veteran Owned Small Business (VOSB) that models future environments, requirements, and capabilities, and then secures the enterprise from internal and external threats compliant with Federal, State, and industry standard governance to ensure client mission success. Our performance standard is “excellence,” with an outcomes-based, quality focus in our services and products, guided by our core values of honesty (in word and deed), relationships (confidence and trust with clients and partners), teamwork (shared goals, mission, and purpose), loyalty (allegiance to our client and team), and importance of others (work and win as a team).

SimIS is currently recruiting for the listed position.

Job Description:
SimIS, Inc. is seeking a Senior Software Architect - Modeling & Simulation SME to lead the technical design and development of NATO's Next Generation M&S capability. This critical role combines advanced software architecture expertise with deep knowledge of military simulation systems to create the future of NATO's warfare simulation infrastructure.

The successful candidate will architect distributed simulation environments that operate seamlessly from strategic planning down to tactical execution, enabling NATO forces to conduct complex multi-domain operations analysis and training. You will be the technical POC who helps transforms operational requirements into scalable, interoperable systems using cutting-edge distributed computing technologies and industry-standard protocols like DIS and HLA.
This position requires a unique blend of technical leadership and domain expertise. You'll design high-level architectures that integrate legacy systems while building next-generation capabilities, ensuring real-time data exchange across global NATO commands. Your work will directly impact NATO's ability to plan, execute, and analyze military operations through advanced simulation technologies.

The candidate performs the following specific assignments:

Design and implement high-level architecture for NATO's next-generation M&S systems
Lead DIS protocol implementation and ensure compliance with IEEE standards
Architect distributed simulation environments supporting multi-location exercises
Develop software components for real-time simulation interaction and data exchange
Create technical specifications for system interfaces and integration points
Design scalable architectures supporting political-to-tactical level simulations
Implement middleware solutions for simulation interoperability
Lead technical reviews of architecture designs and code implementations
Develop APIs for connecting legacy systems (JCTS, JTLS) to new architecture
Optimize network performance for distributed simulation environments
Design data synchronization mechanisms for distributed databases
Create architectural patterns for turn-based and real-time simulation modes

Technical Architecture Focus:

Define enterprise-level M&S architecture standards
Implement publish-subscribe patterns for distributed event handling
Design fault-tolerant systems for mission-critical simulations
Develop microservices architecture for modular simulation components
Create containerized deployment strategies for cloud and on-premise environments

Minimum Experience Requirements within the last 5-10 years:

At least 5 years developing distributed simulation systems using DIS/HLA protocols
At least 3 years designing high-level system architectures for military simulation environments
Proven experience architecting systems that support real-time interaction between multiple simulation nodes
Experience developing APIs and interfaces for simulation interoperability
Strong background in performance optimization for large-scale distributed systems
Experience with both mission-level and campaign-level simulation development
BS in Computer Science, Software Engineering, Computer Engineering, or related discipline.

Experience Desired:

Experience with NATO STANAG standards for simulation
Knowledge of military C4ISR systems integration
Familiarity with game engines adapted for military simulation
Cloud architecture experience (AWS, Azure)
DevOps and CI/CD pipeline experience
PMP or technical architecture certifications

Special Skills/Knowledge/Training Required/Desired:

Strong analytical and problem-solving skills
Excellent written and verbal communication abilities
Expert knowledge of Distributed Interactive Simulation (DIS) protocol and High Level Architecture (HLA) standards
Proficiency in multiple programming languages (C++, Java, Python)
Experience with simulation frameworks and middleware
Strong understanding of network protocols and distributed computing
Database design and data architecture experience
Ability to manage multiple projects and priorities simultaneously
Strong attention to detail and technical accuracy

Benefits:

Medical, Dental, and Vision
Short-Term Disability (at no cost to you) & Long-Term Disability
Life Insurance
401(k) Savings Plan
Flex Spending Accounts
Tuition Assistance Program
Professional Development
Paid Time Off (PTO)
11 Federal Holidays each year

SimIS, Inc. is an EOE / M / F / Disability / VET / Drug Free Employer

About the company

SimIS delivers IT solutions for government and defense, specializing in modeling and simulation, test and evaluation, cybersecurity, and autonomous systems. Its M&S work uses cognitive systems engineering to create executable models and simulations; T&E validates system performance for DoD and DHS; cybersecurity includes compliance support such as CMMC. The company develops autonomous platforms in its robotics lab, including the SimIS Autonomous Maritime System (SAMS) and RiverScout, plus AI/ML, data analytics, software development, and 3D printing. Its model centers on securing prime government contracts and IDIQ vehicles, with services supported by a Tier 3 data center for hosting and managed IT services, aiming to help government customers model, test, secure, and deploy advanced systems.

Company Size

11-50

Company Stage

N/A

Total Funding

N/A

Headquarters

N/A

Founded

2007

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Simplify's Take

What believers are saying

December 2025 SHIELD IDIQ win opens Missile Defense Agency and DoD pipelines.
August 2026 GSA MAS prime status supports recurring federal purchasing and cloud work.
September 2026 Constellis and I/ITSEC presence keeps SimIS visible to buyers and recruits.

What critics are saying

ICE office lease needs Suffolk Council approval; delays block a multi-year revenue stream.
MDA SHIELD positioning still depends on task orders, not guaranteed funded work.
Autonomy demos at I/ITSEC and Constellis do not prove production-scale adoption.

What makes SimIS unique

Veteran-owned Suffolk firm sells cleared modeling, simulation, cyber, and autonomy to defense customers.
GSA MAS prime contract 47QTCA23D0056 runs through February 2043, broadening federal access.
RiverScout and SAMS give SimIS owned robotics platforms, not just staff augmentation.

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Benefits

Health Insurance

Dental Insurance

Vision Insurance

Disability Insurance

Flex Spending Accounts

401(k) Retirement Plan

Tuition Reimbursement

Professional Development Budget

Paid Time Off

Paid Holidays

SimIS

Senior Software Architect - Modeling & Simulation

About the job