Full-Time

Senior Software Test Engineer

Updated on 9/4/2026

Two Six Technologies

Two Six Technologies

501-1,000 employees

Defense-focused tech firm delivering cyber solutions

Compensation Overview

$96.7k - $140k/yr

No H1B Sponsorship

Arlington County, Arlington, VA, USA

In Person

On-site at the Arlington headquarters 4–5 days per week.

US Top Secret Clearance Required

Bachelor's

Category
QA & Testing (1)
Required Skills
Bash
Python
JavaScript
Distributed Systems
Software Testing
SQL
Computer Networking
RDBMS
Docker
AWS
VMWare
Ansible
Playwright
Selenium
Linux/Unix

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Requirements
  • At least 5 years of software testing experience, with exposure to web testing frameworks such as Selenium, Playwright, or Cypress.
  • At least 3 years of experience with backend API testing, integration testing, and functional testing.
  • Solid understanding of networking concepts, distributed systems, and cross-network data flows.
  • Experience with UNIX or Linux-based operating systems.
  • Hands-on experience writing or manipulating SQL or SQL-like queries to interact with relational or non-relational databases.
  • Familiarity with, or a strong interest in, modern development workflows using AI-assisted coding tools and methods for verifying code integrity.
  • Experience testing complex, data-heavy systems or interoperable data streams.
  • Solid grasp of technical writing and documentation.
  • A bachelor's degree in a relevant field, or comparable professional experience.
  • Eligibility to obtain and maintain a TS/SCI security clearance.
Responsibilities
  • Perform software product testing through website interactions and tooling to validate intended functionality or identify and triage issues.
  • Create, maintain, and improve functional, end-to-end, regression, and performance tests in manual test environments.
  • Evaluate how custom web applications, distributed architectures, and interoperable data streams function together as a unified ecosystem.
  • Assist with the progressive rollout and implementation of automated testing frameworks to scale existing manual efforts.
  • Contribute to the design of testing strategies aimed at verifying the quality, robustness, and integrity of AI-assisted code development.
  • Detect, document, and track software defect reports and feature requests.
  • Understand, reproduce, and troubleshoot product defects, collaborating with developers to determine the best resolution.
  • Assist in planning and implementing Testing-Team processes and solutions in alignment with program and operational timelines.
Desired Qualifications
  • Military cyber experience, networking experience, or understanding of common military, cyber, and networking terminology.
  • Familiarity with AI development and testing capabilities.
  • Familiarity with virtualization or cloud technologies such as Docker, vSphere, Ansible, or AWS.
  • Understanding of the Agile Software Development Life Cycle.
  • Experience refining low-level testing or configuration scripts using Bash, Python, or JavaScript.
  • Experience creating automated tests for geospatial libraries such as OpenLayers and CesiumJS.

Two Six Technologies helps national security by doing research and development to create advanced cybersecurity, data science, and information systems solutions for U.S. government clients. Its products, includingPulse, are built through project-based contracts that tailor tools to defend networks, hunt threats, and support cyber mission planning. The company blends interdisciplinary expertise with direct government partnerships to deliver practical, mission-ready outcomes rather than generic tech offerings. Its goal is to provide technological superiority for the United States and its allies through rapid, impactful innovation that strengthens defense capabilities.

Company Size

501-1,000

Company Stage

Early VC

Total Funding

$67.9M

Headquarters

Arlington, Virginia

Founded

2021

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Simplify Jobs

Simplify's Take

What believers are saying

  • June 2026 Sentr deployment and 85% time savings accelerate sales into agencies.
  • SIGMA supported FIFA World Cup 2026 security, proving civilian and international expansion.
  • Over $1.5 billion contract ceiling and OASIS+ access widen 2026 pipeline.

What critics are saying

  • Sentr and Helix invite direct competition from Palantir, Booz Allen, and Leidos.
  • Revelio shows 777 employees in Q1 2026, down 4.7% year over year.
  • Heavy federal exposure makes any DTRA or DoD recompete loss a revenue shock.

What makes Two Six Technologies unique

  • Sentr and Helix turn classified AI orchestration into deployable mission products by June 2026.
  • Two Six combines productized cyber, SIGINT, and information operations with sole-source contract vehicles.
  • CMMC Level 2 and operational deployments signal security credibility inside restricted government environments.

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Benefits

Health Insurance

Dental Insurance

Vision Insurance

Life Insurance

Disability Insurance

401(k) Retirement Plan

Flexible Work Hours

Paid Vacation

Tuition Reimbursement

Growth & Insights and Company News

Headcount

6 month growth

0%

1 year growth

0%

2 year growth

0%
Two Six Technologies
Aug 28th, 2026
Two Six Technologies expands Maryland presence with new Ellicott City office.

Two Six Technologies expands Maryland presence with new Ellicott City office. August 28, 2026 ELLICOTT CITY, Md. - August 2026 - Two Six Technologies recently celebrated the opening of its newly expanded office in Ellicott City, Maryland, marking an exciting milestone as the company continues to grow its team and strengthen its ability to support customers across the region. The expanded space provides Two Six with additional room to accommodate its growing workforce and create an environment designed to support collaboration, innovation, and the company's mission to deliver advanced technology and expertise to its national security customers. "Our expanded Ellicott City office represents an exciting step forward for Two Six Technologies," said Joe Logue, CEO of Two Six. "As our team continues to grow, this space gives us the capacity to support our people, strengthen our customer relationships, and build for the future." The office expansion was made possible through close collaboration with a team of building and design partners, including Bognet Construction, Merritt Properties, LLC, JLL, BoldPilot Inc., and Arris, a Design Studio. From construction and property management to design and project support, each partner played an important role in bringing the new space to life. The newly expanded office reflects Two Six's continued investment in its people, its customers, and its growing presence in Maryland. As the company looks ahead, the new space will provide a foundation for continued growth and collaboration. Two Six is excited to build on this momentum and looks forward to what's ahead for its team and customers in Maryland.

Associated Press
Jun 25th, 2026
Two Six Technologies launches Sentr, AI-powered command center for information warfare

Two Six Technologies has launched Sentr, a command centre platform for information operations that uses AI agents to identify communication opportunities and execute targeted campaigns. The system integrates with existing government tools and can plan campaigns in hours rather than weeks, with early users reporting 85% time savings. Built on Two Six's agentic orchestration layer, Sentr processes large datasets to deliver tailored content to target audiences globally, including in restricted environments. The platform is already deployed with Department of War, Department of State and Intelligence Community customers. The Herndon, Virginia-based company, formed in 2021 by Carlyle Group, employs approximately 900 professionals supporting national security missions. Sentr generates clickable citations for audit trails and scores AI outputs against doctrine-based evaluation frameworks to reduce unreliable recommendations.

WashingtonExec
Jun 25th, 2026
Two Six Technologies debuts Sentr, a command center for information operations.

Two Six Technologies debuts Sentr, a command center for information operations. Two Six Technologies has launched Sentr, a command center platform for information operations that consolidates research, planning and campaign execution into a single chat interface. The platform uses AI agents to process large datasets, identify communication opportunities, generate action plans and deliver targeted campaigns, including in restricted information environments. Users can plan and execute campaigns in hours rather than weeks, with some reporting an 85% time savings. "As a company dedicated to critical missions of national security, Two Six is proud to introduce Sentr, a unique product that enables our U.S. government partners to establish dominance over the narrative battlefield," said Joe Logue, CEO of Two Six Technologies. "Sentr combines agentic AI with a comprehensive command center model to deliver targeted actions and create strategic advantage in the information environment, which allows our partners to complete their missions faster and more effectively than ever before." The platform is already deployed with the departments of War and State and intelligence community customers. It generates interactive, clickable citations for every document used, preserving an audit trail. Interactions with Sentr's large language model are never exposed to third-party endpoints. "We frequently hear from our government partners that they rely on us when they're ready to take action and need to drive change in the real world through information operations," said Becky Fair, chief product officer of Two Six Technologies. "There are countless tools for simply monitoring the information environment, if you want to know what already happened. Sentr is for those who are ready to shape what happens next." Sentr builds on Two Six's Pulse suite of information operations products. Capabilities include: - A unified interface that guides users from research through creation, delivery and assessment using natural language prompts. Powered by Helix, Two Six's agentic orchestration AI, the platform eliminates the need for analysts and planners to manually stitch together data, tools and large language models for each phase of their workflow. - A consolidated workflow that removes information silos and fragmentation that slow decision-making, combining the ability to identify opportunities with the power to act in a single command center interface. - A single platform that replaces a complex, multi-tool capability stack, reducing the risks and inefficiencies created by multiple niche tools that build bloated architectures and expensive integrations. Sentr lets users research the information environment via curated data feeds - with emphasis on narratives tied to great power competition and other national security priorities - plan a response, such as building the documents required to launch a PSYOP campaign, and execute those plans from one interface. Users move from identifying an opportunity to taking action, all within the same interface. For example, a user tracking how Chinese officials discuss infrastructure projects in Cambodia and how local audiences respond can describe that goal to Sentr, which queries its data lake and surfaces relevant tools. From there, the user can build a messaging campaign to those same audiences, refine it based on what resonates, translate it and deploy it on whichever platform the audience uses most - WhatsApp, Facebook Messenger or others - holding a one- or two-way conversation, live or automated. A process that could have taken weeks now takes hours.

Two Six Technologies
Jun 3rd, 2026
Two Six Technologies named top 10 finalist in NATO Innovation Challenge for Agentic AI in Cognitive Warfare.

Two Six Technologies named top 10 finalist in NATO Innovation Challenge for Agentic AI in Cognitive Warfare. June 3, 2026 Two Six Technologies has been selected as one of ten finalists in the NATO Allied Command Transformation (ACT) and NATO Supreme Headquarters Allied Powers Europe (SHAPE) Innovation Challenge focused on Agentic AI for Cognitive Warfare, placing the company among a select group of organizations helping shape the future of information operations across the NATO Alliance. The challenge attracted more than 100 companies from NATO member nations, all competing to provide innovative technologies that can help NATO counter adversarial influence campaigns, psychological manipulation, and efforts to disrupt military decision-making processes. The initiative marks NATO's 18th Innovation Challenge and reflects growing concern over threats targeting the cognitive domain, where adversaries seek to influence perceptions, shape public opinion, and undermine trust through coordinated information operations. Two Six Technologies earned recognition for its cognitive advantage platform which leverages custom-tailored agentic AI to accelerate the planning, execution, and assessment of cognitive warfare operations. The platform is designed to enhance the effectiveness of information operations teams operating in increasingly complex and rapidly evolving information environments. NATO's selection validates its mission-focused approach to developing technology that helps governments and organizations understand, navigate, and compete in today's information environment. As foreign malign influence campaigns continue to grow in sophistication and scale, solutions that combine human expertise with advanced AI capabilities are becoming increasingly critical. The NATO challenge seeks dual-use agentic AI solutions capable of supporting strategic communications and information operations across five key stages: situational understanding, planning, coordination, delivery, and assessment. Desired capabilities include analyzing complex information environments, detecting shifts in public sentiment, mapping influence networks, and generating communication strategies that can adapt in real time. Importantly, NATO has emphasized that selected solutions must maintain meaningful human oversight. The alliance is seeking what it describes as "human-led judgment plus AI-enabled scale and synthesis," rather than fully autonomous influence operations. Proposed technologies must also adhere to NATO's Principles of Responsible Use for Artificial Intelligence, including requirements for lawfulness, explainability, reliability, and bias mitigation. Two Six's selection as a finalist highlights its potential to support NATO's efforts to achieve information advantage while ensuring responsible and transparent use of AI. The platform's agentic AI capabilities are designed to help operators better understand narrative landscapes, identify emerging influence threats, and evaluate the effectiveness of information operations campaigns. The competition culminates with a finalist pitch event in Rennes, France, where selected companies will present their solutions to NATO leadership and defense stakeholders. Finalists were chosen based on their ability to address NATO's evolving cognitive warfare requirements and provide practical tools for countering adversarial influence operations. For Two Six, the recognition underscores the growing international relevance of its cognitive advantage capabilities and reinforces the company's commitment to supporting NATO and allied partners in confronting emerging challenges in the information environment. As competition increasingly extends into the cognitive domain, where narratives and perceptions can shape strategic outcomes, NATO's investment in agentic AI technologies signals the alliance's determination to maintain information superiority and protect decision-making processes against foreign malign influence.

Associated Press
May 6th, 2026
Two Six Technologies launches Helix AI orchestrator for US national security missions

Two Six Technologies has launched Helix, an agentic AI orchestrator designed for the Department of Defense and Intelligence Community, with the company valued at over $1.5 billion in aggregate contract ceiling. The platform addresses the challenge of integrating AI without replacing legacy systems, allowing agencies to preserve existing IT investments whilst gaining immediate AI capabilities. Helix operates in classified environments and is already deployed at two government agencies at Technology Readiness Level 7. The system processes petabytes of data in seconds and can complete tasks in hours that previously required teams and months. The platform features natural language interfaces, turnkey integration across classified and public systems, and custom knowledge bases. Two Six Technologies, headquartered in Northern Virginia with approximately 900 professionals, serves defence, intelligence and civilian agencies.