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.
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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
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Breaking news: Sweat is 100% tax-deductible. (Well, reimbursement-eligible, anyway!) πŸ‹πŸΌβ€β™€οΈπŸ’¨
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Reminder for current employees and potential hires ... if you needed a sign to finally sign up for that pilates class, buy those running shoes, or join that gym down the street... this is it.
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Our Fitness Reimbursement Program is one of our favorite employee perks! We literally want to pay you to move.
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How to get your cash back:
1️⃣ Work out.
2️⃣ Submit your receipt.
3️⃣ Get fit!
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Have questions? Drop us a comment or send us a DM and we’d love to chat! πŸ’ͺπŸΌβ›ΉπŸΌπŸ€ΈπŸΌβ€β™€οΈπŸ€
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The interns have flown the coop! πŸŽ“βœˆοΈ Last week on their final day, our 4 amazing summer interns wrapped up their journey with us in the best way possible. 🌟 Each of them crushed a final presentation, highlighting their biggest projects, proudest moments, and all the valuable skills they learned along the way. πŸ“ŠπŸ’‘ We are so incredibly proud of the hard work, fresh energy, and dedication they brought to the team every single day. πŸ’› While we hate saying goodbye, we know they are going to absolute rockstars in whatever they do next. πŸŒπŸš€ Thank you all for a phenomenal summer, and good luck in your next chapters! πŸ‘‹βœ¨ ... See MoreSee Less

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🌟 Meet Natascha Butler, a phenomenal member of our team at Cornerstone Defense and here featured on our current Employee Spotlight!
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βš™οΈ Natascha supports one of our clients as a Systems Engineer lending her expertise as a Vulnerability Analyst and ISSO. She spends her time scanning systems, analyzing vulnerabilities that are found during the scans and working with the Developers and other Engineers to mitigate those vulnerabilities.
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🀝 This role requires her to function as the liaison between those Engineers and the ISSEs, CISO and other leaders in the organization when it comes to responding to explanations for a vulnerability finding and other cybersecurity related data calls and inquiries.
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πŸŽ“ Prior to joining Cornerstone Defense, Natascha obtained her B.S. degree in Information Sciences and Systems from Morgan State University, affectionately known as the National Treasure, and later earned her Master’s Degree in Management Information Systems from Bowie State University.
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πŸ’Ό Over the years, she has held various positions in both the private and public sector which have garnered her a plethora of experience with:
πŸ“ Technical writing
πŸ” Creating and administering accounts
πŸ› οΈ Troubleshooting hardware, applications, and profile related issues
πŸ”Œ Patching cables and hardware installs for new site stand-ups
πŸ“Š Preparing for system audits
πŸ›‘οΈ Researched and gathering artifacts to administer a Plan of Action and Mitigation (POAM) for severe and critical vulnerabilities found on the network along with getting systems to Authority to Operate (ATO)
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❀️ Natascha is family-oriented and loves people. She has never met a stranger and wants everyone to feel welcomed in her presence. In her spare time, she attends and serves in church as well as enjoys various genres of music, dancing, and all things summer.β˜€οΈ
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🌟 Meet Natascha B

Our latest edition of the β€œAround the Corner” Newsletter just dropped! πŸ“°βœ¨
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And this month, we asked our leadership team one burning question:
πŸ‘‰ β€œWhat does AI actually mean to Cornerstone?”
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The answers? Diverse and unfiltered! πŸ’₯
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We aren’t just looking at AI as a buzzword. We are looking at it through the lens of human potential, ethics, operational scaling, and the future of work.
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Here is a sneak peek into how 5 of our team members view the artificial intelligence revolution shaping our industry. πŸ‘‡
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A few examples of how you’ll feel when we help you score this job! πŸ”₯ Are you an HPC Software Engineer, or do you know one who might be a good fit? Check out the highlights of the job description, below, and reach out to us ASAP to get interviewing! πŸ‘‡
πŸ“ The Details
β€’ Role: HPC Software Engineer (Mid-Career) πŸ’»
β€’ Location: Colorado Springs, CO (On-site) πŸ”οΈ
β€’ Clearance: Active TS/SCI with Polygraph πŸ”’
β€’ Salary: $140,000 - $230,000 πŸ’°
πŸš€ The Mission: Technical User Support (TUS)
β€’ Time to Science: Help HPC users port, optimize, and parallelize codes. ⏱️
β€’ Solutions: Design workflows, modeling, and simulation tools. πŸ› οΈ
β€’ Mentorship: Guide junior engineers and lead code-review sessions. 🌟
β€’ Training: Deliver workshops and tutorials on coding standards. πŸŽ“
πŸ“š What You Need (Basic Qualifications)
β€’ Degree: Bachelor’s in a STEM discipline. πŸ”¬
β€’ Experience: 10+ years professional, 5+ years in modeling & simulation. πŸ“†
β€’ Languages: Fortran, C, and/or C++. πŸ”€
β€’ Scripting: BASH and Korn. 🐚
β€’ OS: Deep Linux operating system proficiency. 🐧
🌟 Bonus Points (Desired Skills)
β€’ Tools: Git, CMake, Makefile, and JIRA. βš™οΈ
β€’ Languages: Python and Perl. 🐍
β€’ Advanced Tech: GPU programming (CUDA/OpenCL) and AI/ML. πŸ€–
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