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Defense Software Engineer Jobs in Virginia (NOW HIRING)

Cornerstone Defense

Software Engineer

Herndon, VA · On-site

Software Engineer Location: Herndon, VA *Clearance: *Active TS/SCI w/ Polygraph needed to apply ... Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space ...

Cornerstone Defense

Software Engineer

Chantilly, VA · On-site

Software Engineer Location: Chantilly, VA *Clearance: *Active TS/SCI w/ Polygraph needed to apply ... Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space ...

Cornerstone Defense

Software Engineer

Chantilly, VA · On-site

Software Engineer Location: Herndon, VA *Clearance: *Active TS/SCI w/ Polygraph needed to apply ... Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space ...

Bectech Inc

Software Engineer

Dahlgren, VA · On-site

Bachelor's Degree (STEM) * 7+ years of experience working on DOD or missile defense software programs * Works Independently, as a team member, or leading teams/tasks * Ability to apply engineering ...

VTG

Software Engineer

Reston, VA · On-site

$105K - $150K/yr

Overview VTG is seeking a Software Engineer to support our Defense customer in Reston, VA . Our Software Engineers are at the forefront of defense technology, crafting high-impact, cutting-edge ...

VTG

Software Engineer

Reston, VA

$105K - $150K/yr

Overview VTG is seeking a Software Engineer to support our Defense customer in Reston, VA . Our Software Engineers are at the forefront of defense technology, crafting high-impact, cutting-edge ...

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Defense Software Engineer information

What is a Defense Software Engineer job?

A Defense Software Engineer develops, tests, and maintains software for military and defense applications. They work on secure, mission-critical systems such as weapons control, cybersecurity, and communication networks. Their role requires proficiency in programming languages, security protocols, and compliance with defense standards. Due to the nature of the industry, security clearances and adherence to classified information policies are often required.

What are the key skills and qualifications needed to thrive in the Defense Software Engineer position, and why are they important?

To thrive as a Defense Software Engineer, you need expertise in software development, a strong grasp of cybersecurity principles, and familiarity with defense industry standards, typically demonstrated by a degree in computer science, engineering, or a related field. Experience with programming languages such as C++, Java, or Python, knowledge of real-time operating systems, and certifications like Security+ or CISSP are often required. Attention to detail, problem-solving abilities, and the capacity to work collaboratively in multidisciplinary teams are valuable soft skills. These competencies ensure that complex, secure, and mission-critical software solutions are effectively developed and maintained to meet stringent defense requirements.

What types of projects and technologies do Defense Software Engineers typically work on?

Defense Software Engineers often work on projects involving the development and maintenance of software for military systems, such as radar, communications, simulation, or weapons control platforms. They frequently use technologies like embedded systems, secure coding practices, and specialized hardware interfaces. Project work can range from upgrading legacy systems to designing cutting-edge capabilities, often requiring adherence to rigorous security and compliance protocols. Collaboration with systems engineers, hardware teams, and government stakeholders is typical, offering a dynamic and mission-driven work environment. This exposure helps engineers build specialized expertise while contributing directly to national security initiatives.

What are popular job titles related to Defense Software Engineer jobs in Virginia? For Defense Software Engineer jobs in Virginia, the most frequently searched job titles are:
What job categories do people searching Defense Software Engineer jobs in Virginia look for? The top searched job categories for Defense Software Engineer jobs in Virginia are:
What cities in Virginia are hiring for Defense Software Engineer jobs? Cities in Virginia with the most Defense Software Engineer job openings:
Defense Software Engineer jobs near you
Infographic showing various Defense Software Engineer job openings in Virginia as of July 2026, with employment types broken down into 100% Full Time. Highlights an 100% In-person job distribution.
Software Engineer (C++ / VxWorks - Defense Domain)

Software Engineer (C++ / VxWorks - Defense Domain)

System Soft Technologies

Dahlgren, VA • On-site

Contractor

Medical, Dental, Vision, Retirement, PTO

Re-posted 4 days ago

Job description

Senior Software Engineer (C++ / VxWorks - Defense Domain)
Location: Dahlgren, VA (Hybrid)
Employment Type: Full-Time / Permanent
Industry: Defense & Aerospace
Vendor Fee: 10%
Compensation: Competitive Salary (Best in Industry) + Full Benefits
Work Authorization: U.S. Citizens Only
Security Clearance: Active DoD Secret Clearance Required
Position Overview
We are seeking a highly skilled Senior Software Engineer to join a premier Defense & Aerospace organization supporting safety-critical missile and weapon system programs. This hybrid position based in Dahlgren, Virginia offers the opportunity to work on advanced Aegis Weapon Systems and mission-critical defense technologies.
The ideal candidate will possess strong expertise in C++ development, VxWorks real-time operating systems, and defense-related software engineering. This role will be responsible for the design, development, integration, and testing of software supporting missile systems, weapon systems, and associated test equipment.
Key Responsibilities
  • Design, develop, integrate, and test safety-critical software for missile and weapon systems.
  • Develop software solutions supporting Aegis Weapon Systems and related test platforms.
  • Write robust, efficient, and maintainable software using C++.
  • Develop and support applications running on VxWorks real-time operating systems.
  • Perform hardware and software integration activities for missile simulators and test equipment.
  • Collaborate with multidisciplinary engineering teams to ensure compliance with defense and safety requirements.
  • Participate in software verification, validation, testing, and troubleshooting activities.
  • Support system-level integration and operational testing efforts.
  • Maintain technical documentation and software development artifacts.
Required Qualifications
Education
  • Bachelor's Degree in Computer Science, Electrical Engineering, Computer Engineering, or a related technical discipline.
Technical Skills
  • Strong hands-on software development experience using C++.
  • Experience developing software on VxWorks RTOS environments.
  • Knowledge of real-time embedded software development principles.
  • Experience working with SMP (Symmetric Multi-Processing) and multi-core architectures.
  • Experience with software integration and testing in complex hardware environments.
Security Requirements
  • Active DoD Secret Security Clearance (Mandatory).
  • Ability to maintain security clearance throughout employment.
  • U.S. Citizenship required.
Preferred Qualifications
  • Experience supporting Aegis Ballistic Missile Defense (BMD) programs.
  • Experience supporting Anti-Air Warfare (AAW) systems.
  • Familiarity with missile flight test programs.
  • Knowledge of Standard Missile initialization messages and telemetry formats.
  • Experience with missile simulators and weapon system test equipment.
  • Previous experience within Defense, Aerospace, Naval, or Missile Systems programs.
Desired Skills
  • Strong analytical and problem-solving abilities.
  • Excellent communication and collaboration skills.
  • Ability to work independently and within highly technical engineering teams.
  • Experience working in safety-critical software development environments.
  • Understanding of software lifecycle processes and defense industry standards.
Benefits
  • Competitive base salary based on experience.
  • Comprehensive Medical, Dental, and Vision Insurance.
  • 401(k) with employer match.
  • Paid Time Off (PTO).
  • Paid Federal Holidays.
  • Career growth opportunities supporting cutting-edge defense technologies.
Ideal Candidate
The ideal candidate is an experienced defense software engineer with deep expertise in C++, VxWorks, and real-time embedded systems who has worked within classified defense environments and possesses an active DoD Secret Clearance. Candidates with direct Aegis, missile systems, or weapon system integration experience will be highly preferred.

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