We help organisations build and run the systems that nations depend on — without slowing the innovation that progress depends on.
Cossack Labs is a UK-headquartered cybersecurity company helping develop secure, resilient digital capabilities that remain operational in highly volatile environments.
Since 2014, we have helped defence, critical-infrastructure, finance, and technology organisations bring complex capabilities into operation — and keep them running under pressure.
Sustainable, responsible progress needs security that enables innovations.
We believe in security engineering that gets applied to modern systems and technologies to enable others to innovate at speed, securely and responsibly.
Our founders built software in banking, government, telecom, and healthcare — industries where security was critical but the tooling was broken. We chose to address the root cause: solutions that didn't fix real risk.
Founder & Chairman
Julian has founded, built, managed, and led multiple software companies over four decades.
Having previously raised tens of millions of dollars of equity finance, he managed three successful disposals, two to publicly-quoted companies, yielding above-average returns to shareholders. His operational focus is on finance, financial strategy, and legal.
Founder & CTO
Eugene has managed software development with high security and performance demands for over 15 years.
His extensive experience and research enable him to focus on the challenges that large and small companies experience when seeking to make data security central to their operations, especially in the face of external pressures and uncertainties.
Founder & Director
Chris originally trained as an economist but has coded, designed, and invested in a diverse range of software systems and companies for over 40 years.
Elegant, appropriate, and useful code continues to delight. Chris sees effort spent to make world-class data security available to all as central to advancing the common good both now and into the future.
Eugene Pilyankevich, Founder & CTO
There is an ongoing debate about the ethics of working in defence. We never had the luxury of theorising. Many of us come from Ukraine, where our R&D office remains. When the enemy is at your doorstep, the moral choice is clear.
We adapted to a new world with new threats. On the frontier where the stakes are very high, compromises have to be few, intentional, and efficient. This is where we are most effective.
MINISTRY OF DEFENCE OF UKRAINEWe helped Ministry of Defence of Ukraine develop a Risk Assessment Framework that assesses and mitigates risk across its defence information and communication systems — grounded in first-hand understanding of how adversaries operate against defence systems in active conflict.
Ukraine’s primary C2 system operates under daily nation-state-level cyberattacks. Cossack Labs works with the DELTA team as a security engineering partner: helping build and maintain a product security programme, as well as hardening more than 30 integrated systems so that the ecosystem remains operational, secure, and resilient under continuous adversarial pressure.
UKRAINE’S MAIN GRID OPERATORWe built a hardware-software cross-domain system that integrates with existing energy infrastructure without interrupting operations. Acting as a reserve data acquisition system, it enables national grid resilience against targeted cyber and physical attacks — keeping operators in control even under partial loss of operational control, including during mass attacks on energy facilities.
UA DroneIDSecure IFF capability between drones, operators, and command structures, designed and used in active combat. Protects high-value assets and increases the operational efficiency of unmanned systems operating under continuous cyberattacks, EW, and active enemy countermeasures.
UNMANNED TRAFFIC MANAGEMENTWith military and civilian drones sharing active conflict airspace, authorities needed a framework to safely integrate UxVs into national airspace — now and post-war. We delivered recommendations tailored to Ukraine's operational realities, creating a foundation for safe drone traffic coordination today and technologically sound regulation tomorrow.
UKRAINE’S MAIN GRID OPERATORWe helped the grid operator rapidly build a secure, reserve hybrid-cloud capability for core grid technology, and supported live migrations under active threat exposure. Addressing the security challenges of virtualising OT, we were able to establish back-up OT infrastructure with seamless transition between primary and reserve systems.
We are engineers and researchers with diverse academic and applied backgrounds
We work as an R&D and bespoke-technology partner, embedding into programmes and missions rather than selling standardised products.
Depending on the objective, we operate as a specialist security engineering unit inside a larger programme, an advisory team, or an end-to-end solution provider for a specific challenge.
General enquiries
info@cossacklabs.comWould you like to work with us?
jobs@cossacklabs.comNew engagements
sales@cossacklabs.comMedia related questions
press@cossacklabs.comHQ, United Kingdom
190 Clarence Gate Gardens, Glentworth Street,
London NW1 6AD, United Kingdom
Get whitepaper
Apply for the position
Our team will review your resume and provide feedback
within 5 business days