Jobs in the United States

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Added 1 min ago
Software Engineer II - Advanced System Tools
RTX Corporation
cedar rapids, IA
Design, develop, test, and support software tools used for avionics development, simulation, integration, verification, and production.
Added 1 min ago
Lead Software Engineer
Evolent
Des Moines, IA
The Lead Software Engineer leads the design, development, and delivery of the web user experience for the Evolent Platform. This role defines the front-end architecture and technical…
Added 2 mins ago
Senior Systems Engineer - APNT Solutions (Onsite)
Collins Aerospace
Cedar Rapids, IA
Collins Aerospace is looking for a Senior Systems Engineer with a passion for engineering and the desire to lead to join the Assured Positioning, Navigation and Timing (APNT) team. The team…
Added 2 mins ago
Principal Systems Engineer - APNT Solutions (Onsite)
Collins Aerospace
Cedar Rapids, IA
Collins Aerospace is looking for a Principal Systems Engineer with a passion for engineering and the desire to lead to join the Assured Positioning, Navigation and Timing (APNT) Solutions…
Added 2 mins ago
Systems Engineer II - APNT Solutions (Onsite)
Collins Aerospace
Cedar Rapids, IA
Collins Aerospace is looking for a Systems Engineer II with a passion for engineering and the desire to lead to join the Assured Positioning, Navigation and Timing (APNT) team. The team is…
Added 3 mins ago
Senior Machine Learning Engineer
Checkr
Denver, CO · San Francisco, CA
…140,000 companies and millions of people rely on Checkr for AI verification in the moments that matter most: getting a new job, a new place to live, a car ride, childcare, even a date.…
Added 4 mins ago
Senior Full-Stack Engineer - Mortgage
Stefanini Group
Miami, FL
Stefanini is looking for a Senior Senior Full-Stack Engineer in Remote - USA
Added 4 mins ago
Senior AI Engineer
Provectus
Brooklyn, NY · Manhattan, NY · NY · NJ · San Francisco Bay Area, CA
Comfort with ambiguity and ownership. Engagements start underspecified by design. Closing that gap is the job.
Added 5 mins ago
Sr. Thermal Engineer
Cummings Aerospace Inc
Arlington, VA
The Senior Thermal Engineer position is a full-time exempt position. The individual will perform thermal system design, analysis, hardware development, integration and validation for a…
Added 7 mins ago
Flight Test Engineer V/VI
Zone 5 Technologies
San Luis Obispo, CA
Collaborate with design engineers, systems engineers, and software developers to define test requirements and procedures.
Added 10 mins ago
Scientist, Systems Engineer
L3Harris Technologies
Palm Bay, FL
…from concept development and requirements definition through design, integration, verification, certification, and field support. You will provide systems engineering leadership across…
Added 12 mins ago
NPI Manufacturing Engineer
Intuitive
Blacksburg, VA
Minimum 4 years of experience as design or manufacturing engineer supporting product with significant mechanical, electromechanical, or electro optical content.
Added 13 mins ago
Senior Quality Engineer
Fortive
Everett, WA
Own and drive Design for Quality (DfQ), DFMEA, design control deliverables, ensuring traceability from requirements to verification / validation.
Added 14 mins ago
Hardware Board Design Engineer - USA
Capgemini
Santa Clara, CA, CA
As a Hardware Board Design Engineer, you will play a critical role in designing and developing next-generation electronic hardware platforms that power innovative consumer and collaboration…
Added 17 mins ago
Sr. ASIC Design Verification Engineer
Cisco
San Jose, CA
Participate in the ASIC design verification for Cisco high-end switching products.
Added 18 mins ago
Senior Full-Stack Engineer - Mortgage
Stefanini Group
Miami, FL
Stefanini is looking for a Senior Senior Full-Stack Engineer in Remote - USA
Added 21 mins ago
Oliver Wyman Vector - Aerospace Software Engineer, Senior Lead - Seattle, WA
Oliver Wyman, LLC
United States
9+ years of experience as a Software Engineer, or similar role in a technology driven environment.
Added 22 mins ago
Operations Software Engineer - Operations
Signant Health
United States
Coordinates with the Software Engineer team to understand design patterns, standards, customizations, and resource capacity planning.
Added 24 mins ago
Hardware Systems Technical Lead
Lightmatter
Mountain View, CA
We are looking for a talented engineer to provide technical leadership to the Hardware Systems organization to help us build the next generation of silicon photonics based artificial…
Added 24 mins ago
Lead Avionics Survivability Engineer
Relativity Space
Long Beach, CA
As the Lead Avionics Survivability Engineer, you will lead the survivability team responsible for ensuring Terran R's electrical and electronic systems can withstand the harsh environments…
Added 24 mins ago
Senior Full-Stack Engineer - Mortgage
Stefanini Group
Miami, FL
Stefanini is looking for a Senior Senior Full-Stack Engineer in Remote - USA
Added 26 mins ago
Jr. Physical Security Engineer (Remote)
DataBank
Dallas, TX
The Junior Physical Security Engineer supports the design, implementation, and maintenance of physical security technology across DataBank’s facilities and data centers. This entry -level…
Added 26 mins ago
Senior Mechanical Engineer
Amazon.com Services LLC
Bellevue, WA · Seattle, WA
We are seeking a talented and motivated Senior Mechanical Engineer to design, integrate, and launch novel robotics hardware, with a focus on actuators and robotic end effectors. The ideal…
Added 28 mins ago
Cybersecurity Engineer II (Contract to Hire)
Mirion
Carrollton, TX
The Engineer II, Cybersecurity Engineering contributes to the delivery of secure command-and-control systems for nuclear and other critical infrastructure environments. Responsibilities…
Added 30 mins ago
A
Electrical Engineer
Actalent
Simpsonville, SC
- $65 to $75 USD / hour
This Electrical Engineer role focuses on designing, developing, and supporting production and engineering test systems, with a strong emphasis on PCBA test fixtures, board-level testing,…

Trinzic

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 KBRAt 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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