Simulation Engineer - TS / SCI Required

Description

The Mission Solutions Business Area at Leidos has an opening for a Simulation Engineer in Reston, Virginia. The primary focus of the work is systems simulation related to reverse engineering Weapons of Mass Destruction (WMD) related facilities. Candidate must bring a creative, yet sound, approach to identifying and solving challenges where all the information desired is inherently unavailable and have exceptional attention to detail and a commitment to thoroughness. The successful candidate will work as a member of an interdisciplinary team of government and contractor personnel. Work will be performed in a fast-paced, high-energy environment within a government facility.

Role and Responsibility :

The candidate shall perform :

Design, develop, evaluate, validate, verify, analyze critical infrastructure related simulations (e.g. electric power, HVAC, building control systems) to understand their interactions and to uncover vulnerabilities. Simulation types include : system of systems simulations, distributed simulations, and object-oriented simulations

Design, build, and maintain efficient, reusable, and reliable codes and models

Collaborate with teams of engineers and developers, participating in regular code reviews

Perform integration testing as well as collaborating with other internal teams

Communicate with project customers or end users to fully understand, plan, and implement feedback and feature requests

Required Education, Clearance, Skills, and Experience :

Candidate MUST possess an active TS / SCI, or a Top Secret clearance with a current SSBI, and be eligible to obtain a TS / SCI w / poly level clearance. US Citizenship is REQUIRED.

BS degree and 8+ years of prior relevant experience or MS with 6+ years of prior relevant experience.

Must have a degree in simulation engineering, systems engineering, data science, operations research or a related field

Experience with system of systems modeling and simulation

Preferred Qualifications :

Working knowledge of MATLAB, VENTSIM, COLE, or SCEPTRE software

Working knowledge of heating and ventilation systems, thermodynamics and airflow, electric power systems, industrial, building, or process control systems.

Professional experience in Unity, Unreal, or other 3D development.

Working knowledge of REACT, JavaScript, Python, C++, C#.

Knowledge of Scrum / Agile development framework.

Experience working with cloud computing platforms such as AWS.

Experience with implementing and maintaining unit testing.

Proficiency with Git or comparable version control system.

Knowledge of 3D modeling software (Blender, Maya, etc.) and ability to manipulate 3D geometry.

Familiarity with applications being deployed to build AR / VR environments and applications such as Unity 3D and Visual Studio.

DevSecOps experience

Machine Learning experience

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Original Posting : September 24, 2025

For U.S. Positions : While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range :

Pay Range $104,650.00 - $189,175.00

The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.