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
Proud to Support Our Warriors! On October 25th, Cornerstone Defense was honored to sponsor the Wounded Warrior Project Carry Forward 5K, a powerful event that puts the mission of honoring and empowering wounded warriors into motion.
One of our incredible team members from North Carolina participated for the third year in a row — continuing a meaningful tradition — and we were thrilled to have another teammate travel all the way from Colorado to run the 5K too! 💪🏃♂️🏃♀️
We’re proud to stand behind this cause and support those who’ve served. #WWPCarryForward #CornerstoneDefense #VeteranSupport #TeamCornerstone #MissionInMotion #WoundedWarriorProject
This cloud is cute, but can it secure IL6 environments?🐾🐶☁️Probably not. But we know some of you can!
We’re on the hunt for a Cloud Engineer I who’s more than just fluff—someone who can architect secure, scalable cloud solutions for mission-critical systems.
If you speak fluent AWS, dream in Terraform, and have a TS/SCI with Poly, we want to talk.
📍 Location: Reston, VA
🛡️ Clearance: TS/SCI with Polygraph
💻 Tech Stack: AWS, Terraform, Python, Linux/Windows, IaC
🎯 Mission: Build and secure cloud environments across multiple classification domains (IL5–IL6+)
✨ Plus: killer benefits, tuition support, 401K match, fitness perks, and a team that actually gets cloud jokes.
🔗 Apply now: cornerstonedefense.com/job-listings/cloud-engineer-i/
🎃👻 Happy Halloween from the Cornerstone Defense crew! We faced ghosts, ghouls, and GovCon horrors — and lived to tell the tale. Swipe through our AI-generated haunted house moments… if you dare 💀🕸️ #hauntedgovcon #halloween2025 #clearancerequired #cornerstonedefense #boocrew
🧩 Can you crack the code? We’re hiring—but we’re not just handing out the job title. Slide through the clues in our carousel and see if you can figure out what role we’re looking to fill.
🔍 Here’s what we can tell you:
• You’ll be working in a secure, mission-critical environment in Springfield, VA
• You’ll support Windows systems, cloud integrations, and classified networks
• You’ll need an active TS/SCI with CI Poly
• You’ll be part of a team that values precision, uptime, and collaboration
• You’ll troubleshoot, patch, and automate your way to operational excellence
💡 Bonus points if you’re fluent in PowerShell, know your way around AWS, and have a Security+ cert in your back pocket.
Think you’ve solved it? 🖱️ Swipe through the slides to confirm your guess. 📩 Ready to apply? Let’s talk.
#TechCareers #WindowsEngineer #TSSCIJobs #NowHiring #CyberCareers #GovTech #SpringfieldVAJobs #ClearanceJobs #SystemsEngineer #JoinOurTeam
“I’ve never seen a workplace where people are so happy!” 😊 That’s what a new team member recently said after a visit to our office — and honestly, we hear that a lot!
This quick hallway moment — just two coworkers laughing during the day-to-day routine — captures something real about our culture. At Cornerstone Defense, we believe that when you build a company on trust 🤝, purpose 🎯, and people-first values 💙, joy becomes part of the job.
We’re mission-driven 🚀, but we never lose sight of the human side of the work. Whether we’re solving complex national security challenges 🛡️ or just sharing a laugh between meetings 😂, we show up for each other—and it shows.
Want to know more about what it’s like to work at Cornerstone Defense? Visit our website today, fill out our contact form or shoot us a LinkedIn direct message. We’d love to hear from you!
#WorkCulture #CornerstoneDefense #HappyTeam #MissionDriven #PeopleFirst #LifeAtCornerstone
