Cornerstone Defense LLC is a Small Business servicing the Intelligence, Defense, and Space communities of the U.S. Government. Cornerstone Defense specializes in cloud architecture, enterprise engineering, systems and network engineering, systems and network security, and application and software development. We use these foundational technology areas to deliver solutions for data analytics, cyber, and space/mission operations, customized to meet mission requirements. We are headquartered in Herndon, VA, with employees working across the U.S including DC, MD, CO, UT, NM, HI, and CA. At Cornerstone Defense, you’ll find a partner that values strong relationships, excellence, and teamwork. Our team is a network of professionals who are dedicated to providing agile, secure, and efficient solutions to support mission success. With Cornerstone Defense, you’re not just choosing a service provider, but a committed, steadfast team with a culture designed to excel.
To find out more information on where we can help you, services we provide,
joining or partnering with our team, please select one of the links below!
We bring together a unique blend of cutting-edge capabilities, specialized expertise, and a remarkable company culture that focuses on the recruitment and retention of highly-sought-after employees.
Learn More
Did you know it’s National Wikipedia Day!? We aren’t quite hype enough to have a Wiki page yet, but we dreamed up what ours might say if we did have one! What do you think? 🤗🤗✅✅
In actuality, Wikipedia pages aren’t just handed out like free chips at a Mexican restaurant! 😂 To qualify, you need:
⭐Notability: Significant coverage in reliable, independent sources (think news articles, not just your own blog).
⭐Verifiability: Facts backed by published sources anyone can check.
⭐Neutral tone: No marketing fluff—Wikipedia wants encyclopedic, not salesy.
⭐Reliable references: Multiple third-party sources, not just your website.
We’ve got the mission, the memes, and the milestones—but fame? Working on it. Maybe if we keep growing, we’ll earn that coveted spot one day. Until then, enjoy our “future page” and celebrate #WikipediaDay with us!
#GovCon #DefenseIndustry #MissionFocused #WikipediaDay
450 in‑houses last year.
At Cornerstone Defense, “in‑houses” are face‑to‑face meetups where our recruiters get to know candidates before their formal interviews—so every conversation starts informed and personal. We ran 450 of these last year, and the results show in our hiring quality and retention.
Ready to work where people come first? Check out our website, or send us a message today!
#MissionDrivenCareers #TeamCornerstone #WeAreHiring
Decode the three hex strings to reveal the role we’re hiring for (below.) If it only takes you a few seconds, this might be the job for you!
63 79 62 65 72
73 6f 66 74 77 61 72 65
65 6e 67 69 6e 65 65 72
Location: Linthicum Heights, MD
Compensation Range: $170 -$190K
Clearance: *Active TS/SCI w/ Polygraph needed to apply *
Required Skills:
• C/C++ Software development skills
• Experience in x86/x64 assembly, software reverse engineering, kernel debugging, and protocol stacks
• Experience developing computer exploits
Preferred Technical Skills:
• Experience developing computer exploits
• Experience in Software Reverse Engineering with at least 1 of the following tool or an equivalent: IDAPro, GDB, WinDbg, Immunity/OllyDbg
• Experience in malware analysis and mitigation techniques
• Strong understanding of the Windows and Linux Operating System internals and APIs
• Knowledge of analyzing shellcode, packed and obfuscated and the associated algorithms a plus
• Experience with scripting languages such as Python, Bash, Pearl, etc
• Experience in host and network analysis to identify and characterize anomalies and vulnerabilities in the platform
• Experience documenting findings in reports and briefings
Were these clues enough to figure out what role we’re hiring for? If so, head to our website and apply today!
Success isn’t just a title or a paycheck—it’s impact, growth, and wellbeing. ✅🤗
At Cornerstone Defense, we build careers that deliver all of that and more.
Ready to join a team where your success matters?
Explore open roles today: Career Page in Comments!
#MissionDrivenCareers #TeamCornerstone #WeAreHiring
From Ops to… TriceratOps? 🦖😂
We’re hiring a Sr. DevSecOps Engineer (TS/SCI w/ CI Poly) in Tysons, VA to design, implement, and maintain secure, automated pipelines that ship reliable software—fast and safely. You’ll partner across dev, ops, and security to embed best practices end-to-end, from IaC and CI/CD to IAM and incident response.
What you’ll do:
• Build CI/CD with automated security testing, vulnerability scanning, and compliance checks
• Own IaC (Terraform/CloudFormation/Ansible) with guardrails baked in
• Run security assessments, code reviews, and pen tests; monitor logs for signals and respond fast
• Implement IAM for robust authN/authZ; guide engineers on secure coding
• Contribute to policies, procedures, and documentation that scale
Tech you’ll touch: Jenkins, GitLab CI, Artifactory, SonarQube, Selenium, Fortify, Acunetix, Prisma Cloud; AWS/Azure/GCP; Python/Bash.
Clearance: Active TS/SCI with CI Poly required.
Location: Tysons, VA
If your pipelines are secure, your IaC is composable, and your logs tell stories, apply now and help us build security into the flow—no fossils allowed.
👉 Link in comments!
#DevSecOps #TSSCI #TysonsVA #CI_CD #Terraform
