WELCOME TO

Cornerstone

About Us

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.

Vision & Mission

Meet The Team

Reilly Leonard

Chief Operating Officer

Reilly Leonard

Chief Operating Officer

Patrick Palmer

Chief Executive Officer

Patrick Palmer

Chief Executive Officer

Brian Sammons

Chief Financial Officer

Brian Sammons

Chief Financial Officer

Darcelle Wilson

VP of Human Resources

Darcelle Wilson

VP of Human Resources

Brandon Altmann

Chief Growth Officer

Brandon Altmann

Chief Growth Officer

Michelle Allen

Director of Systems and Security, FSO

Michelle Allen

Director of Systems and Security, FSO

Virginia Blair

Director of Marketing & Operations

Virginia Blair

Director of Marketing & Operations


Kaitlin Krywy

Managing Director, Aerospace & Defense

Kaitlin Krywy

Managing Director, Aerospace & Defense

WHERE CAN WE HELP?

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!

WHAT WE DO

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

WORK WITH US

Search through all of our open positions.

Learn More

GET IN TOUCH

Contact Us
  • Virginia
    13454 Sunrise Valley Drive, Suite 100
    Herndon, VA 20171
    Maryland
    2288 Blue Water Blvd, Suite 330
    Odenton, MD 21113
  • eFAX
    443.769.1559
  • Phone
    703.691.5100
Globe
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Throwback to our Director of Marketing & Operations, and our VP of Human Resources at the Executive Woman Business Leadership Conference a couple weeks ago — a premier event designed to elevate women in leadership and drive meaningful change across industries hosted by Executive Woman Media.

This year’s conference brought together dynamic women executives for a day of authentic dialogue, strategic insight, and leadership development. From navigating the evolving workplace to fostering inclusive cultures and building resilient teams, the sessions sparked powerful conversations and actionable takeaways.

👏 We’re proud to be part of a community that champions real leadership, real stories, and real results, and we can’t wait to attend again next year!

#ExecutiveWoman #WomenInLeadership #BusinessLeadershipConference #EmpoweredWomen #LeadershipMatters #MarketingAndHR #WomenWhoLead #AuthenticLeadership
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🍻 Got a favorite local hangout? We want in.
We’re looking for more awesome spots to take our Cornerstone pint glasses — breweries, cafés, patios, rooftops, anywhere with good vibes and great people. If you’ve got a place in mind, drop us a DM or tag them below! 👇

In the meantime… can you guess where these photos were taken? 👀

Our pint glasses have been out exploring, and we’re loving the local love!
#CSDEFOnTheGo #CornerstoneSwag #GuessTheLocalSpot #SupportLocal #PintGlassPassport
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Are you really, really, ridiculously good at recruiting?
Or maybe you’re just getting started—but you’ve got the energy, drive, and people skills to crush it.

👋 We’re hiring an Entry-Level Technical Recruiter at Cornerstone Defense!

💼 No experience? No problem.
💥 Uncapped earning potential
🧠 Mentorship from industry pros
🚀 Real impact from day one

If you’re ready to launch your career in the fast-paced world of government contracting, this is your moment.
📩 Apply now and let’s build something great together. cornerstonedefense.com/job-listings/resource-manager-technical-recruiter/

#NowHiring #EntryLevelJobs #TechRecruiter #CornerstoneDefense #CareersThatMatter #RecruiterLife #GovConJobs #MissionDriven
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HOT JOB Alert! Apply before 12/7!🚀 Ready to launch your career in tech recruiting? Cornerstone Defense is hiring an Entry-Level Technical Recruiter — and we’re not just offering a job, we’re offering a mission.

💡 No experience? No problem. We’ll train you.
💼 Want growth? We’re expanding fast.
💰 Like earning potential? It’s uncapped.
🤝 Crave a team that’s got your back? You’ve found it.

Join a company where your work supports national security and your career takes off.

🔗 Apply now and be part of something bigger!

www.linkedin.com/jobs/view/4143033162
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HOT JOB Alert! Apply

In a year that’s tested teams across every industry, we’ve learned that resilience isn’t just about bouncing back—it’s about showing up, staying connected, and moving forward with purpose.

A few weeks ago, our team gathered at Jailbreak Brewing in Maryland for a happy hour that was more than just a break from the day-to-day. It was a celebration of how far we’ve come — together!

We shared stories, laughter, great food, and even better beer. We reconnected not just as colleagues, but as people who care deeply about the work we do and the team we do it with. And that’s why we do what we do!
Want to know what it’s like to work on our team? Reach out today. We’d love to tell you more! 🍻
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