Jobs in the United States

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Staff Software Engineer, Payments Orchestration: Transactions
Trustly
NY
- $218,000 to $328,000 USD / year
Added 1 min ago
Associate, Integration/Test Engineer
L3Harris
Forest, VA
The purpose of the Integration and Test engineer position is to synthesize and define test processes for complex electro-optical and electro-mechanical systems. Coordinate assembly level…
Added 1 min ago
Critical Environments Facility Support Engineer
Insight Global
Sandston, VA
Accountable for the ongoing Critical Environment (CE) support for all service lines ensuring the on-time and defect-free delivery of customer capacity within our SLA commitments.
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Senior Principal Engineer
Leidos
Bridgewater, VA
Knows customer’s current technologies and understands future requirements; identifies current system performance gaps and recommends platform agnostic sensor solutions for bridge projects…
Added 1 min ago
Frontend Software Engineer - Secret
Parsons Corporation
Centreville, VA
Parsons is looking for an amazingly talented Front End Software Engineer to join our team! In this role you will get to:
Added 1 min ago
Senior Cloud Engineer/Architect (AWS)
Leidos
Fort Belvoir, VA
Leidos is seeking an experienced Senior Cloud Engineer/Architect (AWS) to support large-scale migration and operations on a large, high-profile DOD contract Fort Belvoir, VA or Albuquerque,…
Added 1 min ago
Data/Visualization Engineer SME
Leidos
Fort Belvoir, VA
Leidos is seeking a highly skilled Data Visualization Engineer SME specializing in data visualization to join our team in Fort Belvoir, VA or Albuquerque, New Mexico. The primary focus of…
Added 1 min ago
Program Analyst (Secret clearance required)
General Dynamics Information Technology
Springfield, VA
…configuration management activities, SIPR operations support, and customer reporting requirements. The Program Analyst will serve as a key member of the program management team, providing…
Added 1 min ago
Senior Lead Software Engineer - Network Infrastructure and Automation
Nightwing
Sterling, VA
SENIOR LEAD SOFTWARE ENGINEER - NETWORK INFRASTRUCTURE & AUTOMATION
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All Levels: Product Engineer
Hadrian Automation
San Francisco Bay Area, CA · Torrance, CA
- $223,000 to $359,000 USD / year
- Direct work with users, and clear communication. You turn customer needs into shipped software, explain tradeoffs to any audience, and push back when the ask doesn’t match the problem.
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QA Automation Engineer (Hybrid - Glastonbury CT)
Tsunami Tsolutions
Remote, United States
- $85,000 to $115,000 USD / year
We are seeking a QA Automation Engineer to support quality assurance for business applications and data solutions used in regulated aerospace environments. This role combines hands-on…
Added 1 min ago
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Principal Application Software Engineer- Oracle Health
Oracle
United States
- $99,600 to $209,500 USD / year
We are seeking a versatile Principal Application Software Engineer to contribute across platform engineering, cloud infrastructure, distributed systems, application development, integration…
Added 1 min ago
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Senior Application Software Engineer- Oracle Health
Oracle
United States
- $87,000 to $187,000 USD / year
We are seeking a versatile Senior Application Software Engineer to contribute across platform engineering, cloud infrastructure, distributed systems, application development, integration…
Added 1 min ago
Junior ESS Design Engineer
Insight Global
Alexandria, VA
We are looking for an Entry Level/Jr Design Engineer to join our Electronic Security team immediately. This person will sit in Alexandria, VA. Schedule is Monday-Friday, 8am-5pm, with the…
Added 1 min ago
ENGINEER SOFTWARE 1
Huntington Ingalls Industries
Newport News, VA
Utilize customer input to improve deliverables
Added 1 min ago
Systems Development Engineer, Deployment and Support, Google Public Sector
Google
Reston, VA
Share Systems Development Engineer, Deployment and Support, Google Public Sector
Added 1 min ago
Sr. Structural Engineer, Data Center Engineering
Amazon
Herndon, VA
Amazon Web Services (AWS) is seeking a Senior Structural Engineer to become part of a Data Center Engineering team. This engineer will be located in any of the 3 offices listed with intent…
Added 1 min ago
Sr. Estimating Manager, AMER Estimating and Cost Control
Amazon
Herndon, VA
Reverse engineer awarded contracts and build portfolio-level pricing intelligence that informs BOD estimating, VE opportunities, and OP planning across AMER
Added 1 min ago
Full Stack Software Engineer (Associate/Experienced)
The Boeing Company
Herndon, VA
The Boeing Company is currently seeking a Full Stack Software Engineer (Associate/Experienced) (UI Focus) with experience in software engineering and architecting to support the Denali…
Added 1 min ago
Java Software Engineer (Associate/Experienced)
The Boeing Company
Herndon, VA
The Boeing Company is currently seeking a Java Software Engineer (Associate/Experienced) with experience in software engineering and architecting to support the Denali Software team located…
Added 1 min ago
DevOps Engineer I (Ability to Obtain Secret clearance Required)
Akima
Herndon, VA
Suvi Global Services is looking for a talented Jr. DevOps Engineer to add to their dynamic team supporting highly visible federal contracts. This role supports and provides security…
Added 1 min ago
Secret VPN Firewall Engineer
Insight Global
Norfolk, VA
Insight Global is seeking a VPN and Firewall Engineer to support a large government contract. This person will be responsible for updating, maintaining and configuring F5, Palo Alto and…
Added 1 min ago
Senior Information System Security Engineer
ManTech
Norfolk, VA
MANTECH seeks a motivated, career and customer-oriented Senior Information System Security Engineer (ISSE) to join our team in Norfolk, VA. This is a remote position.
Added 1 min ago
Sr Security Engineer, Network, Leo Security
Amazon
Herndon, VA · Arlington, VA
…communities around the world. We are looking for a senior security engineer to join the Leo Infrastructure and IP Security team. The team defends the manufacturing lines, launch sites, and…
Added 1 min ago
Sr Security Engineer, Leo Security
Amazon
Herndon, VA · Arlington, VA
We are looking for a senior security engineer to join the founding cohort of the Engineering and R&D team within Leo Infrastructure and IP Security. The team defends the manufacturing…

KBR

Principal Modeling & Simulation Software Engineer

Reston, VA, United States

On-site

Compensation range for Virginia is $170,000 to $195,000

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Job details

Pay: Compensation range for Virginia is $170,000 to $195,000
Workplace: On-site
Posting language: English
Posted: Nov 2, 2026

Original job description

Title:

Principal Modeling & Simulation Software Engineer At KBR, we deliver science, technology and engineering solutions to governments and companies around the world. KBR employs approximately 37,000 people worldwide with customers in more than 85 countries and operations in over 28 countries. KBR is proud to work with its customers across the globe to provide technology, value-added services, and long-term operations and maintenance services to ensure consistent delivery with predictable results.

Trinzic is the future independent company to be created through the planned spin-off of KBR's Mission Technology Solutions business, expected in January 2027. Our people work at the frontier of what is possible, delivering solutions in challenging environments and advancing some of the world's highest-priority national security and space missions.

Backed by decades of mission success, deep expertise, and trusted partnerships, Trinzic will launch as a global organization with more than 18,000 employees supporting customers around the world. Join us at a defining moment and help shape the future of a company built to tackle complex challenges and make a meaningful impact.

Candidates who join KBR's Mission Technology Solutions business before the spin-off will transition to Trinzic when the separation is complete and will not need to reapply for employment.

Key Responsibilities:

KBR is seeking a highly skilled and experienced Principal Modeling & Simulation Software Engineer to join a dynamic, high-performing, multidisciplinary team of military domain SMEs, modelers, and analysts located in Northern Virginia. This team leverages advanced modeling, simulation, and analysis (MS&A) tools such as SAFE-SiM to shape and inform Concept Exploration, Course of Action Analysis, and Operational Planning efforts for Department of War (DoW) stakeholders. The ideal candidate shall:

Design, develop, and maintain modeling primitives, behaviors, and reusable software components using AFSIM scripting languages, C#, Razor, and other applicable technologies.
Implement new model capabilities and enhancements that accurately represent operational systems, platforms, sensors, weapons, command-and-control functions, and other mission-relevant entities.
Develop model compositions and complex behaviors by integrating lower-level primitives into reusable simulation constructs.
Create and execute verification and validation test plans to ensure model functionality, performance, and fidelity prior to integration into the core simulation framework.
Identify, troubleshoot, and resolve software defects and model performance issues through structured testing and debugging.
Prepare technical documentation describing model design, implementation approaches, assumptions, limitations, and test results.
Collaborate closely with software engineers, integration teams, analysts, and subject matter experts to ensure models meet mission and technical requirements.
Support integration, regression testing, and configuration management activities associated with deployment into enterprise modeling and simulation environments.
Provide technical guidance and peer reviews to promote software quality, consistency, and adherence to development standards.

Work Environment:

Location: On-site
Travel Requirements: Minimal 0-20%, supporting strong work-life balance
Working Hours: Standard

Qualifications:

Required:

Bachelor of Science in Computer Science, Software Engineering, or other STEM field with 10+ years of relevant experience
4+ years of modeling, simulation, and analysis (MS&A) experience with one or more mission-level combat simulation frameworks such as AFSIM, NGTS, ITASE, SAFE-SiM, or similar environments
Demonstrated proficiency in object-oriented software development using C#, C++, Python, or comparable programming languages
Experience developing, modifying, testing, and debugging models, behaviors, or simulation components within AFSIM or similar modeling and simulation environments
Experience applying software engineering best practices including version control, structured testing, documentation, and configuration management
Active Top-Secret clearance with Sensitive Compartmented Information (SCI) eligibility
Demonstrated ability to work effectively in a small, high-performance team environment
Strong collaborative skills with experience working in expert-driven, multidisciplinary teams

Desired:

Master of Science in Computer Science, Software Engineering, or other STEM field with 12+ years of relevant experience
Experience developing or modifying Razor-based model components
Experience developing reusable software libraries, model primitives, behaviors, or simulation extensions for integration into larger modeling and simulation frameworks
Familiarity with MBSE techniques and tools, with the ability to translate operational concepts and behavioral models into executable simulation capabilities
Familiarity with automated testing, continuous integration, or software quality assurance processes within modeling and simulation environments
Experience with source control, software configuration management, automated build pipelines, and CI/CD tools such as Git, GitLab, Jenkins, DevOps, or similar platforms
Experience representing military systems, sensors, weapons, effects, or command-and-control processes in mission-level simulations
Scheduled Weekly Hours:40hrs
Basic Compensation:The offered rate will be based on the selected candidate’s knowledge, skills, abilities and/or experience and in consideration of internal parity.
Compensation range for Virginia is $170,000 to $195,000

Additional Compensation:

KBR may offer bonuses, commissions, or other forms of compensation to certain job titles or levels, per internal policy or contractual designation. Additional compensation may be in the form of sign on bonus, relocation benefits, short-term incentives, long-term incentives, or discretionary payments for exceptional performance. Ready to Make a Difference?If you’re excited about making a significant impact in the field of national defense and working on projects that matter, we encourage you to apply and join our team at KBR. Let's shape the future together.KBR BenefitsKBR offers a selection of competitive lifestyle benefits which could include 401K plan with company match, medical, dental, vision, life insurance, AD&D, flexible spending account, disability, paid time off, or flexible work schedule. We support 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.

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Skills

people@work
C#
Troubleshoot
Debugging
Computer science
Software development
C++
Python
Programming languages
Documentation
Software libraries
Test automation
CI/CD
Quality assurance methodologies
Git
GitLab
Jenkins
DevOps

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