Software Engineer
Cornerstone DefenseAbout the role
Title: Software Engineer Location: Herndon, VA
Clearance:
Active TS/SCI w/ Polygraph needed to apply
Company Overview: Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government. Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission. Our Team is pushed every day to use their industry leading knowledge to provide end-to-end solutions to combat our nation's toughest and most secure problems. If you are looking for a place to not only be professionally challenged, but encouraged and supported by a company that cares, don't look any further than Cornerstone Defense. Required Education, Experience, & Skills : We are looking for experienced Software Developers to join our technology-based program supporting a key Government customer. A bachelor's or master's degrees in computer science are preferred with a minimum of three (3) year's relevant experience with the following skillsets: 1+ years working in AWS C2S 2+ years experience participating in agile activities. Infrastructure as a code language (Ansible, Puppet, or chef as examples) Eclipse developmental duties Git Hub, Dev Ops, Java and Python. Candidate should have experience in security review of applications and infrastructure. 2+ Years experience participating in agile activities. 3+ years of RECENT Java or Python or .Net experience 3+ years of RECENT Database Administration (oracle or MYSQL) experience Research new technologies in object-oriented programming. Experience in Cloud based services. Works well in an engineering team environment with other teammates who varied skills levels. Ability to mentor others Preferred Education, Experience, & Skills : Experience with infrastructure automation technologies like Docker, Vagrant, etc. Experience with build automation technologies like Maven, Jenkins, etc. Experience with with building APIs and services using REST, SOAP, etc Experience with scripting languages like Perl, Shell, etc.
Responsibilities
- Support a key Government customer with software development
- Participate in agile activities
- Conduct security reviews of applications and infrastructure
- Research new technologies in object-oriented programming
- Mentor other team members
Qualifications
- Bachelor's or master's degree in computer science preferred
- 1+ years working in AWS C2S
- 3+ years of recent experience in Java or Python or .Net
- 3+ years of recent Database Administration experience (Oracle or MySQL)
Skills mentioned
About Cornerstone Defense
Cornerstone Defense LLC is a mission‑focused Small Business supporting the U.S. Defense, Intelligence, and Space communities. We specialize in secure cloud architecture, enterprise engineering, systems and network engineering, cybersecurity engineering, and full‑stack application development. Our technical expertise enables advanced solutions in data analytics, zero‑trust security, AI/ML‑enabled mission systems, and space and tactical operations. As a trusted partner across the Federal landscape, Cornerstone Defense delivers agile, compliant, and high‑assurance capabilities aligned with today’s most critical government priorities — including Digital Modernization, Cloud Migration, Cyber Resilience, DevSecOps, and Mission Integration. Headquartered in Herndon, VA, our team supports customer missions nationwide, including in DC, MD, CO, UT, NM, HI, and CA. We pride ourselves on a culture built on integrity, technical excellence, and long‑term partnerships. At Cornerstone Defense, you don’t just receive support — you gain a dedicated, cleared workforce committed to delivering secure, innovative, and operationally ready solutions that advance mission success.