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.
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✨ Looking Back on 2025 ✨
As we start the New Year, we’re taking a moment to reflect on everything that made 2025 unforgettable—the highs and lows, the challenges that pushed us forward, and the successes that reminded us why we do what we do.
This montage is more than just clips; it’s a celebration of resilience, creativity, and the incredible people who’ve been part of this journey. Most of all, thank you to everyone who has followed along, supported us, and shared in these moments. You’re the reason we keep striving for more!
💬 Now it’s your turn! Drop your New Year’s goals or simply share your wishes for 2026 in the comments—we’d love to hear what’s ahead for you!
Here’s to a bright, bold, and inspiring new year! 🥂
Happy New Year’s Eve! We’re back with another round of Where in the World is Cornerstone Defense! 🌍🤗Any guesses where this snowy scene with our sweet, Cornerstone logoed beanie is?! 🏂☃️❄️But more importantly, drop us a comment and let us know what your New Year’s Eve/Day plans, we’d love to hear! We hope, wherever you are, you’re staying warm and cozy, and getting excited to ring in the New Year! 🎉
It may be Christmas but guess what — we’re still hiring! 😂🎄 Okay, well, our office is closed today but we will still be up and running from now till the end of the year with plenty of new job opportunities, so don’t hesitate to reach out! Pictured, our Director of Marketing and Operations with her sweet younger sister who got to visit our office recently and enjoy our festive Christmas Tree and decorations. We love that our team can include their friends and family in our work life and work culture, most especially during the holiday seasons! 🙌🤗
All that said, Merry Christmas from our team to you! Thanks for following along with us, engaging, and supporting the work we do. We hope you’re having the happiest winter season — Happy Holidays! ❄️🎁🎉
🚨 We’re Hiring! 🚨
Are you a systems-savvy pro with a passion for secure, high-performance networks? Cornerstone Defense is looking for a Systems Administrator in San Diego, CA, with deep expertise in network infrastructure, security architecture, cloud computing, and virtualization.
🔍 What You’ll Bring:
✅IAT Level II Compliance
✅ 4+ years of system management experience
✅ Mastery of LAN/WAN, VPNs, TCP/IP, DHCP, DNS
✅ Security-first mindset: firewalls, encryption, threat mitigation
✅ Cloud fluency: SaaS, IaaS, PaaS, hybrid deployments
✅ Hands-on with virtualization, performance tuning, and fault diagnostics
🌐 If you thrive in fast-paced environments and want to make a real impact, we want to hear from you.
📢 Apply now and help us build secure, scalable systems that power mission-critical operations.
And just for fun, this video features a very popular spot somewhere in sunny San Diego 🌴 — can you guess where?
💬 Drop your guesses in the comments — and if you’ve been there, share your favorite memory!
#SystemsAdministrator #CybersecurityJobs #CloudComputing #CornerstoneDefense #SanDiego #GuessTheSpot #TechCareers #NowHiring #JoinOurTeam
🎧 Cornerstone Defense: 2025 Wrapped
We had over 13,000 applicants this year (even we’re surprised by that number! 😲). Of those, more than 7,000 were eligible—cleared and ready to support the mission. 🌎 Applicants came from over 3,000 cities across the country, bringing with them a rich tapestry of backgrounds, experiences, and perspectives—including a strong representation of veterans and diverse communities. 🇺🇸🌍 And here’s the kicker: 80% of those who interviewed were hired—because when we meet the right people, we know it. 💼✨
We’re proud of the talent we’ve connected with this year, and we’re even more excited to meet new faces, grow our team, and expand our network in 2026. 🚀 Whether you’re looking to join us or collaborate, we’re ready. We can’t wait for what’s to come in 2026! 🎉 #CornerstoneWrapped #DefenseCareers #HiringStats #2025Recap #2026Goals #VeteransWelcome #DiversityInDefense
