Cyber Security Engineering


Greysys LLC is a small information security focused research and development company based in Maryland. We offer an array of cyber-focused services to both public and private sector agencies and companies with advanced cyber security needs.

Please get in touch if you want to find out more.


Our engineers have been advancing the art and science of computer security for their entire careers. Our customers, projects, and solutions have afforded us extensive experience in both offensive and defensive tactics, techniques, and procedures.


At Greysys, our customer's mission is our mission. Our engineers maintain focus on the needs of your organization and leverage their experience to deliver custom solutions to ensure success.


Hard challenges and technical problems in cyber security are what drive us. Whether it is breaking or building, our team has fielded operationally proven solutions for many challenges faced in today's fast paced digital networks.

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Our services.

Intrusion Intelligence

Greysys provides expert guidance and critical intelligence to defend against the sophisticated adversary. Our services include host and network forensics with attack reconstruction, intrusion and malware analysis, threat modeling, defensive analytics, and effective mitigation strategies.

Vulnerability Expertise

Our engineers share a passion for finding and analyzing vulnerabilities. We have experience in software reverse engineering, source code analysis, fuzzing, analyzing and tracing program behavior, in order to discover and accurately evaluate the exploitability of software and system vulnerabilities.

Cyber Defense

Our defensive services include protecting software/IP through anti-reversing and other code protections, comprehensive code review for security flaws, computer and network security assessment, penetration testing, and red teaming.

CNO Software Solutions

We have experience delivering operationally ready solutions and supporting efforts through the full lifecycle of development. Our engineers are subject matter experts in the languages they work in and operating systems they work on. Secure development practices protect the investment made in our delivered products.

Research & Development

Let us help your organization meet your mission needs. Greysys has experience doing groundbreaking research, rapid prototyping, and proof of concept development for many complex challenges faced in unique network configurations. Innovating and inventing are what drive us.

Technical Training

We offer custom training in our areas of expertise. Training areas include Microsoft Windows system & kernel development and debugging, vulnerability analysis, penetration testing, reverse engineering and more. Use the contact form below to inquire about specific training or to be made aware of any public offerings.

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About us.

Greysys was created to cater to the needs of talented cyber security engineers who are dedicated to professionalism, customer satisfaction, and share a passion for technical challenges, while at the same time maintaining a proper work and life balance.

Our skills

We are always looking for talented security engineers that share our passion. The skills we are honing and always on the lookout for include:

  • C/C++
  • Kernel Development
  • Exploit Development
  • Reverse Engineering
  • Penetration Testing
  • Malware Analysis
  • Operating Systems Internals
  • Debugging

Our Benefits

Our organization is focused on the needs of our talented engineers, and we strive to offer a competitive benefits package so that we can all just focus on getting the work done. Our benefits include:

  • Medical (PPO, HSA with Funded Deductible)
  • Dental / Vision
  • Short/Long Term Disability
  • Generous Training Budget
  • Computer Allowance
  • Flexible PTO
  • Federal Holidays
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Get in touch.

We invite you to contact us to network, inquire about working with us, or if you've got a hard problem you'd like our input on.

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