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

Sean Wentz

Managing Director, MPO

Sean Wentz

Managing Director, MPO

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
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A quick #latergram to say Happy Holidays from our team to yours! (Because we may have forgotten to post this earlier this week 😂.) But hey, no matter what holidays you are celebrating this time of year, we hope your days have been merry and bright and that you’re looking forward to the start of a new year and new beginnings! ... See MoreSee Less

A quick #latergram to say Happy Holidays from our team to yours! (Because we may have forgotten to post this earlier this week 😂.) But hey, no matter what holidays you are celebrating this time of year, we hope your days have been merry and bright and that you’re looking forward to the start of a new year and new beginnings!

We are in full holiday mode at Cornerstone over the last couple weeks! Last week, we attended the annual Christmas Tea fundraiser hosted by the Loudoun County Social Collective, each year benefiting a different cause. This year’s proceeds went to SPARC Solutions (Special Adapted Resources Centers), and incredible organization that  provides essential day programs for adults with disabilities at six locations in Northern Virginia. The Social Collective was able to raise upwards of $50,000 for this fantastic cause, and we are so grateful we could be a part of  something that is so emblematic of what the holidays are really about! ❄️🎄💖 If you feel called to donate or learn more about SPARC, visit their website here: sparcsolutions.org/. ... See MoreSee Less

We are in full holiday mode at Cornerstone over the last couple weeks! Last week, we attended the annual Christmas Tea fundraiser hosted by the Loudoun County Social Collective, each year benefiting a different cause. This year’s proceeds went to SPARC Solutions (Special Adapted Resources Centers), and incredible organization that  provides essential day programs for adults with disabilities at six locations in Northern Virginia. The Social Collective was able to raise upwards of $50,000 for this fantastic cause, and we are so grateful we could be a part of  something that is so emblematic of what the holidays are really about! ❄️🎄💖 If you feel called to donate or learn more about SPARC, visit their website here: https://sparcsolutions.org/.Image attachmentImage attachment+4Image attachment

All we want for Christmas is ... for YOU to get the new job of your dreams! 😂 But seriously, we aren't slowing down just because it's the end of the year. As always, we have plenty of hiring opportunities available and we'd love to see your resume. View our current listings and learn about our great benefits today at cornerstonedefense.com/job-listings/. We hope to hear from you! ... See MoreSee Less

Meet Matt Monroe, our dynamic Recruiting Manager who brings unmatched energy and expertise to our team! With over a decade of experience in the recruiting industry, Matt has a talent for connecting incredible people with opportunities that ignite their potential. His passion for building relationships and his sharp eye for top talent have made him an invaluable asset to our organization.

Matt’s driving personality is contagious—he approaches every challenge with determination and enthusiasm, inspiring those around him to aim higher. When he’s not busy transforming careers, you can find Matt mentoring aspiring recruiters, and finding new ways to bring out the best in our workplace culture.

In his spare time, Matt Enjoys playing hockey, golf, and getting outside with his dog, Jackson!
His favorite advice? “Don’t rest on your laurels!”

We’re lucky to have Matt on our team, and we know he’ll continue to make a big impact both here and in the lives of the people he helps every day. Drop a 👏 in the comments to celebrate Matt with us!
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Two weeks ago, several incredible women from our team had the privilege of attending the Annual Women's Business Leadership Conference hosted by Diversity Woman Media! 🌟💼 It was an empowering experience filled with inspiring speakers, valuable insights, and opportunities to connect with other trailblazing women in business.

They returned with fresh ideas, renewed confidence, and a deeper commitment to driving positive change in our workplace and beyond. 💪✨ We’re so proud of their dedication to leadership and growth!
... See MoreSee Less

Two weeks ago, several incredible women from our team had the privilege of attending the Annual Womens Business Leadership Conference hosted by Diversity Woman Media! 🌟💼 It was an empowering experience filled with inspiring speakers, valuable insights, and opportunities to connect with other trailblazing women in business.

They returned with fresh ideas, renewed confidence, and a deeper commitment to driving positive change in our workplace and beyond. 💪✨ We’re so proud of their dedication to leadership and growth!Image attachmentImage attachment+5Image attachment
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