WELCOME TO

Cornerstone

Careers at Cornerstone

Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government.  Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission.  Our Team is pushed every day to use their industry leading knowledge to provide end-to-end solutions to combat our nation’s toughest and most secure problems.  If you are looking for a place to not only be professionally challenged, but encouraged and supported by a company that cares, don’t look any further than Cornerstone Defense. We seek, hire, and cultivate the future leaders in technologies, management, and operations. Reach out and start a conversation about how you can be a part of the Cornerstone Defense Team!

EXPLORE OUR CURRENT OPENINGS

TOP 5 Reasons to join us!

1

Core Values

Our core values are honesty, integrity, professionalism, and fairness. These values are utilized with all employees, partners, and clients. When faced with tough decisions, we ask ourselves ā€œwhat is the right move?ā€ In an industry that is constantly changing, our core values are not something that Cornerstone Defense will ever compromise.

2

Committed

We have a binding promise to our employees to make sure that they are prepared to provide the best service to our clients. Cornerstone Defense is committed to taking a holistic view of our team, ensuring each employee is able to balance successfully supporting their customer’s mission as well as maintaining a healthy lifestyle.

3

Approach

We use a consultative approach to hiring, employment, and execution. We look for quality employees and identify the appropriate opportunities for them, not the other way around. Our employees are always our number one concern. We firmly believe that if we take care of our employees, business will follow.

4

Attention

We focus on the details of efficiently managing personnel and business. We are consistently looking for new and unique ways to show our employees that they are the most important asset within the company. We fully understand and manage the need for both the Esprit de Corp and professional training for every Cornerstone Defense employee.

5

Transparency

We make every effort to communicate all aspects of Cornerstone operations with our employees. Transparency is fundamental to the culture of our company. We firmly believe that establishing a diverse and inclusive environment creates the best possible outcome for our employees, our clients, and the missions we support.

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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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We need a lot of things. šŸ˜‚šŸ˜‚ But right now, we mostly need a Senior Information Systems Security Engineer! Job description below — browse through and see if this could be a job for you! šŸš€šŸ”
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Senior Information Systems Security Engineer
šŸ“ Reston, VA
šŸ”’ TS/SCI with Polygraph Required
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We are seeking a highly skilled, hands-on Senior Information Systems Security Engineer (ISSE) to secure mission‑critical systems across hybrid, cloud, and air‑gapped environments. The ideal candidate brings deep technical expertise in RMF, STIG compliance, vulnerability scanning, continuous monitoring, and secure system engineering—someone who is actively involved in building and configuring secure solutions rather than simply reviewing them. In this role, you will design, engineer, assess, and sustain security controls across complex system architectures, ensuring compliance, operational readiness, and mission resilience. šŸ’¼āœØ View our website for more info!
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Intern Update! šŸš€
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Yesterday we hosted an all‑in‑one deep dive into HR, Security, and Marketing for our amazing interns — and what a day it was! šŸ’¼šŸ”šŸ“£
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At Cornerstone Defense, it’s important to us that our interns gain real-life skills and a genuine understanding of how the inner workings of a company come together. Not just so they can shine during their internship 🌟 — but so they walk away with knowledge that helps shape where their career paths go next. 🧭✨
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We had great conversations, lots of learning moments, and plenty of laughs along the way. Nothing makes us happier than watching our interns grow, ask big questions, and build confidence in the fields they’re exploring. šŸ™ŒšŸ’”
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Here’s to investing in our future leaders — one session at a time! šŸ’™šŸ‘©ā€šŸ’»šŸ‘Øā€šŸ’»
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✨ Another amazing day partnering with Boulder Crest! šŸŒæšŸ’Ŗ
Our team spent yesterday mulching (and mulching… and mulching!) to help get the property ready for their big Red, White & Bluegrass celebration happening this weekend! šŸŽ¶šŸŒ­šŸ„¤

Supporting Boulder Crest Foundation’s mission to serve combat veterans, first responders, and their families is always an honor — and pitching in to help prep for such a meaningful community event made the day even sweeter. šŸ’™

šŸ“… Red, White & Bluegrass – June 13
Think live bluegrass, great food, cold drinks, local vendors, line dancing, a bourbon tasting, and an incredible raffle with prizes like Morgan Wallen field tickets, a signed Justin Moore guitar, a PS5, and more. It’s a full day of summer fun, and every ticket supports Boulder Crest’s life‑changing programs.

šŸ“ø Swipe through to see our crew in action — a lot of sweat, even more smiles, and mountains of mulch!
āž”ļø And if you need an enthusiastic volunteer team for your next project, we’re always ready to roll up our sleeves!
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PSA/reminder for our Cornerstone employees šŸ“£šŸ’™

Did you know your work anniversary = FREE SWAG?! šŸ¤©šŸŽ

Yep — each year you get a chance to jump into our swag store and pick out something fun, functional, or just plain cool. From windbreakers to hats to office must‑haves… our team has been making excellent choices šŸ˜ŽšŸ‘Œ

Swipe āž”ļø to see what your coworkers have snagged!
And if your anniversary is coming up… get excited. Your inbox will have a little present with your name on it šŸŽ‰
#EmployeeEngagement #workanniversaryperks #swag #CompanyCulture #PeopleFirst
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šŸš€ AI adoption isn’t a tech problem. It’s a people problem.
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Our team attended the Carahsoft GovExperience Summit yesterday to discuss the practical realities of scaling AI in the public sector.
Here are 4 mission-critical takeaways from the sessions:
1ļøāƒ£ Adoption is the real hurdle. The hardest part of AI isn’t the code; it’s culture. Convincing employees that AI is a tool to elevate their work—not replace it—is key.
2ļøāƒ£ Map your bottlenecks. Before deploying new tech, identify your operational friction points. Course-correct early to pave a smooth path for AI integration.
3ļøāƒ£ Reverse-engineer your mission. AI is useless if it delays or disrupts your core outcomes. Start with your mission goals and work backward to find the right tool.
4ļøāƒ£ Robotics & AI are merging. The future of robotics is deeply tied to autonomous decision-making, shifting how we think about readiness and efficiency.
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Special shoutout to the panels on ā€œLeveraging AI to Enhance Efficiency and Readinessā€ and ā€œThe Business of Government: Aligning Services to Mission Outcomesā€ for driving these crucial conversations.

šŸ‘‰ Swipe through the photos to see our highlights from the event!
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#GovTech #ArtificialIntelligence #PublicSectorInnovation #Carahsoft #DigitalTransformation
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