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About

Application security testing, led by one dedicated team

ProcSecurity is built on a straightforward principle: the person who scopes your engagement is the same person testing your application and the same person writing your report. No hand-offs, no account managers relaying messages, no junior tester learning on your budget.

At a Glance
FocusApplication & API Security
BackgroundIndustry Consultancy
ResearchIndependent Vulnerability Disclosure

The person behind ProcSecurity

NK
Nick Kelley
Founder & Security Consultant

Nick brings years of experience at the forefront of application security, balancing a blend of deep technical expertise and seasoned client-facing acumen. His career is distinguished not only by hands-on, manual penetration testing and threat modeling as a Security Consultant at NCC Group, but also by leading presales activities, providing technical expertise to support Account Managers and business executives across the entire sales cycle, from generating leads to resolving technical challenges for clients.

Prior to founding ProcSecurity, Nick built on years of success specialising across the full application security lifecycle, from secure design and threat modeling through to code review and pre-release testing, scoping and delivering everything from standard reviews to complex multi-phase engagements for clients across a wide range of industries. He brings extensive commercial and communication experience in bringing high-value, sustainable application security outcomes to a broad client base.

As Founder of ProcSecurity, he is spearheading the company's mission and values, driving true commitment to helping clients secure their applications, and fostering trust, clarity, and long-term partnership. That commitment is grounded in years of experience delivering application security engagements at NCC Group, and his specialisation is further reflected in Hall of Fame acknowledgements from the United Nations, Apple, Microsoft, Sony, Check Point, Deutsche Telekom, and web.de.

Specialties
Application Penetration Testing API Security Testing Threat Modeling Secure SDLC Review Cloud & Container Security Security Reporting Remediation Guidance Presales & Scoping

What clients and colleagues say

Recommendations from engagements and shared projects, shown as written.

KK
Kim Klaver
DGA PR-Dashboard
Client

Great working with Nick. Distance no problem, remote was all we needed. Quick, thorough, careful. A personal approach in a techworld. We hired Nick before and will do that again. Thank you Nick!

TG
Tara Goodwin-Ruffus, PMP
Senior Project Manager, Cybersecurity Consulting & Security Assessments
Colleague · NCC Group

I had the pleasure of working alongside Nick during my time managing UK and European cybersecurity engagements at NCC Group, where he served as a consultant on several of my projects.

What stood out about Nick from the start was the combination of technical depth and professionalism he brought to every engagement. As a penetration tester, he was reliable and thorough, the kind of consultant you could count on to deliver quality work without having to chase. From a project management perspective, that consistency made a real difference.

Beyond his technical ability, Nick was genuinely easy to work with. He communicated clearly, collaborated well with clients and colleagues alike, and brought a personable approach that made even complex security engagements feel well-managed and human. That balance of technical strength and interpersonal skill is rarer than it should be in this industry.

I would not hesitate to recommend Nick to any organization looking for a skilled and dependable security consultant.

DR
Daina Ripley
Project Resource Partner
Colleague · NCC Group

I had the pleasure of working with Nick at NCC Group. They consistently impressed me with their exceptional skills within technical consulting, particularly in cloud and infrastructure. Beyond technical skills, Nick is a fantastic team player, always offering support and creating a positive environment. They would be a valuable asset to any team, I highly recommend Nick. I look forward to seeing their future success. Thank you for everything!

ET
Earl Stephen Tejada
Project Manager, Cybersecurity
Colleague · NCC Group

I'd like to give a shout out to Nick, having worked with him at NCC. He's incredibly hardworking, proactive, and very client-focused. Even after a project was already completed, he would still go above and beyond to make sure everything was in good shape and that the client felt supported.

Nick was also always very helpful whenever I had technical questions, always willing to share his knowledge and explain things clearly. I wish you luck, my friend. It was a pleasure working with you recently, and I foresee only good things coming your way.

United NationsVulnerability Disclosure AppleSecurity Research SonyVulnerability Disclosure MicrosoftSecurity Response Center Check PointVulnerability Disclosure Deutsche TelekomBug Bounty web.deBug Bounty

Vulnerability research acknowledged through public and private disclosure programmes.

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