Seaport NextGen

Prime: Cornerstone Defense LLC
Contract Number: N0017819D7415

Contract Administration: Sonya Hughes – 703.880.2697 direct, s.hughes@csdef.com
Business Development: Patrick Palmer – 703.691.5103 direct, 703.598.6695 mobile, pat@csdef.com

Connect with us

Find us on Social Media and keep up to date with job openings and the latest news!

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
Comments Box SVG iconsUsed for the like, share, comment, and reaction icons

This cloud is cute, but can it secure IL6 environments?🐾🐶☁️Probably not. But we know some of you can!

We’re on the hunt for a Cloud Engineer I who’s more than just fluff—someone who can architect secure, scalable cloud solutions for mission-critical systems.

If you speak fluent AWS, dream in Terraform, and have a TS/SCI with Poly, we want to talk.

📍 Location: Reston, VA
🛡️ Clearance: TS/SCI with Polygraph
💻 Tech Stack: AWS, Terraform, Python, Linux/Windows, IaC
🎯 Mission: Build and secure cloud environments across multiple classification domains (IL5–IL6+)

✨ Plus: killer benefits, tuition support, 401K match, fitness perks, and a team that actually gets cloud jokes.

🔗 Apply now: cornerstonedefense.com/job-listings/cloud-engineer-i/
... See MoreSee Less

This cloud is cute, but can it secure IL6 environments?🐾🐶☁️Probably not. But we know some of you can!

We’re on the hunt for a Cloud Engineer I who’s more than just fluff—someone who can architect secure, scalable cloud solutions for mission-critical systems.

If you speak fluent AWS, dream in Terraform, and have a TS/SCI with Poly, we want to talk.

📍 Location: Reston, VA
🛡️ Clearance: TS/SCI with Polygraph
💻 Tech Stack: AWS, Terraform, Python, Linux/Windows, IaC
🎯 Mission: Build and secure cloud environments across multiple classification domains (IL5–IL6+)

✨ Plus: killer benefits, tuition support, 401K match, fitness perks, and a team that actually gets cloud jokes.

🔗 Apply now: https://cornerstonedefense.com/job-listings/cloud-engineer-i/

🎃👻 Happy Halloween from the Cornerstone Defense crew! We faced ghosts, ghouls, and GovCon horrors — and lived to tell the tale. Swipe through our AI-generated haunted house moments… if you dare 💀🕸️ #hauntedgovcon #halloween2025 #clearancerequired #cornerstonedefense #boocrew ... See MoreSee Less

🎃👻 Happy Halloween from the Cornerstone Defense crew! We faced ghosts, ghouls, and GovCon horrors — and lived to tell the tale. Swipe through our AI-generated haunted house moments… if you dare 💀🕸️ #HauntedGovCon #Halloween2025 #ClearanceRequired #CornerstoneDefense #BooCrewImage attachmentImage attachment+2Image attachment

🧩 Can you crack the code?   We’re hiring—but we’re not just handing out the job title. Slide through the clues in our carousel and see if you can figure out what role we’re looking to fill.
 
🔍 Here’s what we can tell you:
• You’ll be working in a secure, mission-critical environment in Springfield, VA
• You’ll support Windows systems, cloud integrations, and classified networks
• You’ll need an active TS/SCI with CI Poly
• You’ll be part of a team that values precision, uptime, and collaboration
• You’ll troubleshoot, patch, and automate your way to operational excellence
💡 Bonus points if you’re fluent in PowerShell, know your way around AWS, and have a Security+ cert in your back pocket.
 
Think you’ve solved it? 🖱️ Swipe through the slides to confirm your guess. 📩 Ready to apply? Let’s talk.
 
#TechCareers #WindowsEngineer #TSSCIJobs #NowHiring #CyberCareers #GovTech #SpringfieldVAJobs #ClearanceJobs #SystemsEngineer #JoinOurTeam
... See MoreSee Less

🧩 Can you crack the code?   We’re hiring—but we’re not just handing out the job title. Slide through the clues in our carousel and see if you can figure out what role we’re looking to fill.
 
🔍 Here’s what we can tell you:
 • You’ll be working in a secure, mission-critical environment in Springfield, VA
 • You’ll support Windows systems, cloud integrations, and classified networks
 • You’ll need an active TS/SCI with CI Poly
 • You’ll be part of a team that values precision, uptime, and collaboration
 • You’ll troubleshoot, patch, and automate your way to operational excellence
💡 Bonus points if you’re fluent in PowerShell, know your way around AWS, and have a Security+ cert in your back pocket.
 
Think you’ve solved it? 🖱️ Swipe through the slides to confirm your guess. 📩 Ready to apply? Let’s talk.
 
#TechCareers #WindowsEngineer #TSSCIJobs #NowHiring #CyberCareers #GovTech #SpringfieldVAJobs #ClearanceJobs #SystemsEngineer #JoinOurTeamImage attachmentImage attachment+3Image attachment

“I’ve never seen a workplace where people are so happy!” 😊 That’s what a new team member recently said after a visit to our office — and honestly, we hear that a lot!
 
This quick hallway moment — just two coworkers laughing during the day-to-day routine — captures something real about our culture. At Cornerstone Defense, we believe that when you build a company on trust 🤝, purpose 🎯, and people-first values 💙, joy becomes part of the job.
 
We’re mission-driven 🚀, but we never lose sight of the human side of the work. Whether we’re solving complex national security challenges 🛡️ or just sharing a laugh between meetings 😂, we show up for each other—and it shows.
 
Want to know more about what it’s like to work at Cornerstone Defense? Visit our website today, fill out our contact form or shoot us a LinkedIn direct message. We’d love to hear from you!
 
#WorkCulture #CornerstoneDefense #HappyTeam #MissionDriven #PeopleFirst #LifeAtCornerstone
... See MoreSee Less

🎃👻 It may be spooky season… but the scariest thing of all? How many open roles we’re hiring for! 🕷️💼
 
Our haunted headquarters is decked out for Halloween, but behind the cobwebs and pumpkins, we’re on the hunt for top-tier talent. If you hold a TS/SCI with polygraph and you’re ready to level up your career, Cornerstone Defense wants to hear from you.
 
🧠 Cyber, cloud, data, and more — we’ve got roles that’ll make your resume scream (in a good way).
 
🔗 Apply now: cornerstonedefense.com
... See MoreSee Less

🎃👻 It may be spooky season… but the scariest thing of all? How many open roles we’re hiring for! 🕷️💼
 
Our haunted headquarters is decked out for Halloween, but behind the cobwebs and pumpkins, we’re on the hunt for top-tier talent. If you hold a TS/SCI with polygraph and you’re ready to level up your career, Cornerstone Defense wants to hear from you.
 
🧠 Cyber, cloud, data, and more — we’ve got roles that’ll make your resume scream (in a good way).
 
🔗 Apply now: cornerstonedefense.comImage attachmentImage attachment+1Image attachment
Load more