Applications Dev Sr Prin

We are seeking a highly skilled Senior Software Developer to support U.S. military Modeling & Simulation (M&S) efforts. This role involves the design, development, integration, and maintenance of simulation systems used for training, analysis, and decision support in defense environments. The ideal candidate will have deep experience in software engineering as well as a strong understanding of military systems, simulation standards, and real-time/constructive simulations.

Key responsibilities:

Design, implement, and maintain simulation software for military training and analysis.

Lead software architecture decisions and mentor junior developers.

Integrate models and simulations with C4ISR systems, data sources, and external interfaces (e.g., DIS, HLA, DDS).

Translate operational military requirements into scalable and reusable software components.

Develop and test simulation scenarios, models, and system behaviors to meet fidelity and performance goals.

Work closely with systems engineers, subject matter experts (SMEs), and military users to validate and verify simulation capabilities.

Ensure compliance with software development standards, security guidelines, and configuration management practices.

Contribute to technical documentation, including design specifications, test plans, and user manuals.

Required Skills and Education

Bachelor’s degree in Computer Science, Software Engineering, or related field.

At least 5 years of software development experience, with at least 2 years in the M&S domain.

Proficiency in one or more of the following languages: C++, C#, Java, or Python.

Experience with simulation frameworks such as HLA (High-Level Architecture), DIS (Distributed Interactive Simulation), or OneSAF, JSAF, VBS, etc.

Familiarity with DoD M&S standards and tools (e.g., STOW, RTI, SISO standards).

Strong knowledge of software engineering best practices (Agile/Scrum, CI/CD, version control).

About BAE Systems Intelligence & Security

BAE Systems, Inc. is the U.S. subsidiary of BAE Systems plc, an international defense, aerospace and security company which delivers a full range of products and services for air, land and naval forces, as well as advanced electronics, security, information technology solutions and customer support services. Improving the future and protecting lives is an ambitious mission, but it’s what we do at BAE Systems. Working here means using your passion and ingenuity where it counts – defending national security with breakthrough technology, superior products, and intelligence solutions. As you develop the latest technology and defend national security, you will continually hone your skills on a team—making a big impact on a global scale. At BAE Systems, you’ll find a rewarding career that truly makes a difference.

Intelligence & Security (I&S), based in McLean, Virginia, designs and delivers advanced defense, intelligence, and security solutions that support the important missions of our customers. Our pride and dedication shows in everything we do—from intelligence analysis, cyber operations and IT expertise to systems development, systems integration, and operations and maintenance services. Knowing that our work enables the U.S. military and government to recognize, manage and defeat threats inspires us to push ourselves and our technologies to new levels.

This position will be posted for at least 5 calendar days. The posting will remain active until the position is filled, or a qualified pool of candidates is identified.

Preferred Skills and Education

Master’s degree

Experience with GIS, terrain databases, or synthetic environment generation.

Understanding of military doctrine, tactics, and operational scenarios.

Experience with containerization technologies (OpenShift, Docker, Kubernetes).

Familiarity with cloud platforms or distributed simulation environments.

Benefits Information

Employee Benefits: At BAE Systems, we support our employees in all aspects of their life, including their health and financial well-being. Regular employees scheduled to work 20+ hours per week are offered: health, dental, and vision insurance; health savings accounts; a 401(k) savings plan; disability coverage; and life and accident insurance. We also have an employee assistance program, a legal plan, and other perks including discounts on things like home, auto, and pet insurance. Our leave programs include paid time off, paid holidays, as well as other types of leave, including paid parental, military, bereavement, and any applicable federal and state sick leave. Employees may participate in the company recognition program to receive monetary or non-monetary recognition awards. Other incentives may be available based on position level and/or job specifics.

Intern Benefits: Temporary employees generally are not eligible for BAE Systems benefits, but can elect to participate in the 401(k) savings plan. Temporary employees working 20+ hours per week are eligible for medical benefits, the employee assistance program, and business travel accident insurance.

Please note: Some benefits may be different for union employees that are governed by a collective bargaining agreement (CBA) or for positions covered by a wage law called the McNamara-O’Hara Service Contract Act (SCA).