WELCOME TO

Cornerstone

Our Culture

The Cornerstone Defense culture is based upon the concept that our employees are the foundation of our business. We support our Customers’ needs of providing mission focused individuals by engaging our employees in meaningful positions, training, social events, and both civic and philanthropic event participation. We reach the best mission outcome for our Customers by prioritizing our well-balanced and motivated workforce and their values. Every person at Cornerstone Defense is a valued member of our team and at the heart of our culture is the belief that when you are happy, empowered, and encouraged to grow, everyone benefits.

Community Outreach

Everyone at Cornerstone Defense realizes the importance of giving back to their community. Our company began as a Service-Disabled Veteran-Owned Small business and in light of that, we support several Veteran based charitable organizations. As we continue to grow as a company, we are always looking for ways to give back to the community by participating in various annual events, raising money and awareness for these worthy causes.

Diversity & Inclusion

Cornerstone Defense is proud to be an Equal Opportunity Employer. We are committed to creating an inclusive working environment for all employees and to upholding diversity in our recruiting and hiring processes. All qualified applicants will receive equal consideration for employment without regard to sex, gender identity, sexual orientation, race, color, age, religion, national origin, physical or mental disability, protected Veteran status, or any other characteristic protected by law.

Benefits Overview

A quick overview into some of our great benefits at Cornerstone Defense:

  • Medical, Dental, Vision Plans
  • Generous PTO Policy
  • 401(k)
  • HSA and FSA options
  • Life and Disability Insurance
  • Tuition Reimbursement and Training
  • Perks at Work Discount Program
  • Referral Program
  • Leads Generation Program
  • CollegeAmerica 529
  • Fitness Reimbursement Program
  • Travel Assistance
  • Norton Lifelock Benefit Solutions
  • Life Planning Financial & Legal Services

Continuing Education and Training

Cornerstone Defense’s self-paced and self-study online courses are helpful in not only gaining knowledge, but many are also geared towards specific industry certifications and degrees. These zero-cost to employee offerings are comprised of over 7,000 hours of technical, IT related courses, covering all aspects and career paths from Security to Engineering. In the event you can’t find a certification or education training track within our SkillSets online portal, Cornerstone Defense also offers reimbursement for many other types of professional certifications, continuing education, and training programs.

Employee Voices

We are happy to share about the meaning of our Culture at Cornerstone Defense, but we are thrilled when an employee can share the same sentiment. Here’s a recent review from our Cornerstone Defense Glassdoor page that we hope gives insight into working at Cornerstone:

“Working at Cornerstone Defense has been an incredibly rewarding experience, and I couldn’t be more satisfied with the way this company treats its employees. From the moment I joined, it was evident that employee well-being is a top priority here. One of the standout features of working at Cornerstone is the emphasis on creating a positive work environment through various employee events and initiatives. Whether it’s team-building activities, wellness programs, or celebratory events, there’s always something happening to foster camaraderie and boost morale among the staff. These events not only create a sense of belonging but also contribute to a happier and more cohesive workplace. Moreover, I am truly impressed by Cornerstone’s commitment to giving back to the community through its charitable contributions. It’s heartwarming to see the company actively involved in supporting meaningful causes, and it instills a sense of pride in being part of an organization that values social responsibility. What sets Cornerstone apart is the accessibility and approachability of top management. Unlike some companies where senior leadership feels distant or unapproachable, here, the top managers are not only accessible but also genuinely interested in hearing from employees at all levels. They actively solicit feedback, listen to our ideas, and take proactive steps to implement positive changes based on employee input. Furthermore, Cornerstone is committed to fostering a culture of fairness and transparency. I appreciate how decisions are made with fairness and equity in mind, and everyone’s contributions are recognized and valued. This creates a sense of trust and mutual respect among colleagues, which ultimately leads to a more harmonious and productive work environment. In summary, working at Cornerstone has been an enriching journey characterized by a supportive work culture, meaningful employee engagement initiatives, and a genuine commitment to making a positive impact both within the organization and in the broader community. I feel fortunate to be part of such a forward-thinking and employee-centric company.”

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

Did you know it’s National Wikipedia Day!? We aren’t quite hype enough to have a Wiki page yet, but we dreamed up what ours might say if we did have one! What do you think? 🤗🤗✅✅
 
In actuality, Wikipedia pages aren’t just handed out like free chips at a Mexican restaurant! 😂 To qualify, you need:
 
⭐Notability: Significant coverage in reliable, independent sources (think news articles, not just your own blog).
⭐Verifiability: Facts backed by published sources anyone can check.
⭐Neutral tone: No marketing fluff—Wikipedia wants encyclopedic, not salesy.
⭐Reliable references: Multiple third-party sources, not just your website.
 
We’ve got the mission, the memes, and the milestones—but fame? Working on it. Maybe if we keep growing, we’ll earn that coveted spot one day. Until then, enjoy our “future page” and celebrate #WikipediaDay with us!
#GovCon #DefenseIndustry #MissionFocused #WikipediaDay
... See MoreSee Less

Did you know it’s Image attachment

450 in‑houses last year.
At Cornerstone Defense, “in‑houses” are face‑to‑face meetups where our recruiters get to know candidates before their formal interviews—so every conversation starts informed and personal. We ran 450 of these last year, and the results show in our hiring quality and retention.
Ready to work where people come first? Check out our website, or send us a message today!
 
#MissionDrivenCareers #TeamCornerstone #WeAreHiring
... See MoreSee Less

Decode the three hex strings to reveal the role we’re hiring for (below.) If it only takes you a few seconds, this might be the job for you!
63 79 62 65 72
73 6f 66 74 77 61 72 65
65 6e 67 69 6e 65 65 72
 
Location: Linthicum Heights, MD
Compensation Range: $170 -$190K
Clearance: *Active TS/SCI w/ Polygraph needed to apply *
 
Required Skills: 
• C/C++ Software development skills
• Experience in x86/x64 assembly, software reverse engineering, kernel debugging, and protocol stacks
• Experience developing computer exploits
 
Preferred Technical Skills:
• Experience developing computer exploits
• Experience in Software Reverse Engineering with at least 1 of the following tool or an equivalent: IDAPro, GDB, WinDbg, Immunity/OllyDbg
• Experience in malware analysis and mitigation techniques
• Strong understanding of the Windows and Linux Operating System internals and APIs
• Knowledge of analyzing shellcode, packed and obfuscated and the associated algorithms a plus
• Experience with scripting languages such as Python, Bash, Pearl, etc
• Experience in host and network analysis to identify and characterize anomalies and vulnerabilities in the platform
• Experience documenting findings in reports and briefings

Were these clues enough to figure out what role we’re hiring for? If so, head to our website and apply today!
... See MoreSee Less

Success isn’t just a title or a paycheck—it’s impact, growth, and wellbeing. ✅🤗
 
At Cornerstone Defense, we build careers that deliver all of that and more.
Ready to join a team where your success matters?
Explore open roles today: Career Page in Comments!
 
#MissionDrivenCareers #TeamCornerstone #WeAreHiring
... See MoreSee Less

Success isn’t just

From Ops to… TriceratOps? 🦖😂
 
We’re hiring a Sr. DevSecOps Engineer (TS/SCI w/ CI Poly) in Tysons, VA to design, implement, and maintain secure, automated pipelines that ship reliable software—fast and safely. You’ll partner across dev, ops, and security to embed best practices end-to-end, from IaC and CI/CD to IAM and incident response.
 
What you’ll do:
• Build CI/CD with automated security testing, vulnerability scanning, and compliance checks
• Own IaC (Terraform/CloudFormation/Ansible) with guardrails baked in
• Run security assessments, code reviews, and pen tests; monitor logs for signals and respond fast
• Implement IAM for robust authN/authZ; guide engineers on secure coding
• Contribute to policies, procedures, and documentation that scale
 
Tech you’ll touch: Jenkins, GitLab CI, Artifactory, SonarQube, Selenium, Fortify, Acunetix, Prisma Cloud; AWS/Azure/GCP; Python/Bash.
 
Clearance: Active TS/SCI with CI Poly required.
Location: Tysons, VA
 
If your pipelines are secure, your IaC is composable, and your logs tell stories, apply now and help us build security into the flow—no fossils allowed.
 
👉 Link in comments!
#DevSecOps #TSSCI #TysonsVA #CI_CD #Terraform
... See MoreSee Less

From Ops to… Trice
Load more