Sr. Software Developer (Real-Time Simulation & Dev Lab) (Engineer Software 3)

Mission Technologies, a division of HII; Patuxent Highland (MD); On-site; USD 107,000 - 150,000; Full time

Job summary

Mission Technologies, a division of HII, seeks a Sr. Software Engineer to design and maintain translation software for JSE GRID-based simulators in Patuxent River, MD.

You will work with C++ and Java across Linux and Windows, collaborating with a remote team to deliver high-fidelity simulation capabilities for DoW environments. The role requires TS clearance and US citizenship, hands-on development, debugging, and documentation, plus the ability to work on-site with occasional travel.

Qualifications

• 5 years relevant experience with Bachelor’s in related field; 3 years relevant experience with Masters in related field; or 9 years relevant experience with High School Diploma or equivalent.
• Experience with object-oriented software design and development of multi-threaded applications, particularly in C++ and Java.
• Experience with software development in a Linux environment (Oracle Linux, Red Hat Enterprise Linux).
• Proficiency working in a Linux command-line environment (Bash).
• Experience working with Git version control system, including branching, merging, and conflict resolution.
• Knowledge of best practices for the full software development lifecycle, including coding standards, code reviews, source control, build processes, testing, and operations.
• Able to successfully manage competing tasks and priorities.
• Strong oral and written communication, troubleshooting, and organizational skills, with the ability to work in a remote distributed team environment.
• Current or active (or interim) Secret clearance, with ability to obtain and maintain a DoW Top Secret clearance.
• Must be a US citizen.

Responsibilities

• Design, develop, document, test, and debug C++ and Java simulation protocol translation software in Linux.
• Use distributed modeling and simulation protocol specifications (DIS, GRID, HLA) to derive requirements, create software designs, and perform verification/validation.
• Integrate, troubleshoot, and maintain translation software to facilitate interoperability with GRID-based systems in a JSE simulation laboratory environment.
• Support software architecture development and documentation.
• Work independently on-site while collaborating with a remote team, determining and developing effective solutions with minimal supervision.
• Create technical documentation, including design specifications, installation procedures, and end-user guides.
• Evaluate and review C++ and Java code, ensuring high-quality, scalable, and maintainable designs.
• Develop multi-threaded or parallel-processing components and inter-process communication solutions.
• Use Git for daily development, including branching, merging, pull requests, and resolving conflicts.
• Work in Linux (Bash) and Windows environments; interact with remote repositories and CI/CD infrastructure.
• Collaborate with other engineers and system architects to design new capabilities and support integration of SPDE translators into the JSE environment.
• Participate in software testing, debugging, documentation, and customer demonstrations.
• Support training, troubleshooting, and operational use of translation software and JSE components alongside government personnel.

Skills

C++

Java

Linux

Multithreading

Git

US Citizenship

Communication

Education

Bachelor's degree in related field

Master's degree in related field

Tools

VSCode

CLion

IntelliJ

Eclipse

Job description

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Sr. Software Developer (Real-Time Simulation & Dev Lab) (Engineer Software 3)

Location: Patuxent River, MD, Maryland, United States

Requisition Number:30539

Required Travel: 0 - 10%

Employment Type:Full Time/Salaried/Exempt

Anticipated Salary Range:$106,647.00-$150,000.00

Security Clearance:Top Secret

Level of Experience:Mid

This opportunity resides with Global Security (GS).Mission Technologies’ Global Security (GS) group comprises live, virtual, constructive (LVC) solutions; fleet sustainment; nuclear and environmental; and Australia business.
As a trusted partner to our military customers, HII designs, develops and operates the largest LVC enterprise that prepares warfighters for cross-domain battle. With advanced technologies to enable mission readiness, HII understands that preparation requires full coordination—not readiness in piece-parts.
For more than 40 years, the U.S. Navy has entrusted HII to maintain and modernize the vast majority of its fleet. With a holistic approach to life-cycle maritime defense systems—from small watercraft to submarines, surface combatants and aircraft carriers—HII ensures a high state of readiness.
HII supports the Department of Energy’s national security mission through the management and operation of its sites, as well as the safe cleanup of legacy waste across the country. HII meets clients’ toughest nuclear and environmental challenges.

Leadership at HII is a mindset, not a title. Through our Leadership Capability Framework, we define how every employee grows, leads, and contributes—regardless of role. It sets the standard for how you can develop yourself and what you can expect from leaders across our organization. We look for candidates who want to grow in alignment with these capabilities:

• Know & Grow Your People– Commit to learning and supporting team success.
• Build Relationships– Communicate openly, collaborate well, and build trust.
• Take Ownership– Deliver on commitments and take pride in your work.
• Customer First– Focus on the mission and those we serve.
• Shape the Future– Bring ideas, curiosity, and continuous improvement.
• Act with Urgency– Take initiative and follow through with purpose.

These capabilities guide how all employees contribute to our shared success across Mission Technologies.

Job Description

HII is seeking a skilled and motivated Sr. Software Engineer to design, develop, and maintain critical simulation translation software components to integrate with US Department of War (DoW) Joint Simulation Environment (JSE) Global Reusable Interface Domain (GRID) based simulation systems. This role is executed primarily in HII and partner facilities in the Patuxent River, MD, area. The candidate will leverage their expertise in C++ and Java, along with strong design skills, to enhance the functionality of HII Simulation Performance Data Engine (SPDE) translators to support JSE integration with other simulation protocols, such as Distributed Interactive Simulation (DIS) and High-Level Architecture (HLA). This role requires a solid understanding of software architecture and development best practices and the ability to work independently on-site while working as part of a remote software development team.

Developing software for an advanced synthetic training environment. This software will integrate with JSE GRID-based flight simulators and related components to support pilot training against potential threats. Support software development, software integration, customer training and demonstrations.

• Design, develop, document, test, and debug C++ and Java simulation protocol translation software in Linux.
• Use distributed modeling and simulation protocol specifications (DIS, GRID, HLA) to derive requirements, create software designs, and perform verification/validation.
• Integrate, troubleshoot, and maintain translation software to facilitate interoperability with GRID-based systems in a JSE simulation laboratory environment.
• Support software architecture development and documentation.
• Work independently on-site while collaborating with a remote team, determining and developing effective solutions with minimal supervision.
• Create technical documentation, including design specifications, installation procedures, and end-user guides.
• Evaluate and review C++ and Java code, ensuring high-quality, scalable, and maintainable designs.
• Develop multi-threaded or parallel-processing components and inter-process communication solutions.
• Use Git for daily development, including branching, merging, pull requests, and resolving conflicts.
• Work in Linux (Bash) and Windows environments; interact with remote repositories and CI/CD infrastructure.
• Collaborate with other engineers and system architects to design new capabilities and support integration of SPDE translators into the JSE environment.
• Participate in software testing, debugging, documentation, and customer demonstrations.
• Support training, troubleshooting, and operational use of translation software and JSE components alongside government personnel.

Minimum Qualifications

• 5 years relevant experience with Bachelors in related field; 3 years relevant experience with Masters in related field; 0 years relevant experience with PhD or Juris Doctorate in related field; or High School Diploma or equivalent and 9 years relevant experience.
• Experience with object-oriented software design and development of multi-threaded applications, particularly in C++ and Java.
• Experience with software development in a Linux environment (Oracle Linux, Red Hat Enterprise Linux).
• Proficiency working in a Linux command-line environment (Bash).
• Experience working with Git version control system, including branching, merging, and conflict resolution.
• Knowledge of best practices for the full software development lifecycle, including coding standards, code reviews, source control, build processes, testing, and operations.
• Able to successfully manage competing tasks and priorities.
• Strong oral and written communication, troubleshooting, and organizational skills, with the ability to work in a remote distributed team environment.
• Current or active (or interim) Secret clearance, with ability to obtain and maintain a DoW Top Secret clearance.
• Must be a US citizen.

Preferred Requirements

• Active Top Secret/SCI clearance.
• Experience developing software for DoW distributed simulations.
• Experience with NGTS, GRID, DIADS, ART, WSCE, FIAB, VATS, or related simulation frameworks.
• Experience with scripting in shell and/or Python.
• Experience working with C++-focused IDEs such as VSCode or Clion, and Java-focused IDEs such as IntelliJ or Eclipse.
• Experience contributing to the system design or architecture of new and current systems.
• Experience with Agile software practices.
• Experience supporting Special Access Program (SAP) efforts.

Physical Requirements

Adequate visual acuity and manual dexterity for meeting the requirements Software Engineer family.

The listed salary range for this role is intended as a good faith estimate based on the role's location, expectations, and responsibilities. When extending an offer, HII's Mission Technologies division takes a variety of factors into consideration which include, but are not limited to, the role's function and a candidate's education or training, work experience, and key skills.

Meet HII’s Mission Technologies Division

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