Home
- Cyber security services, dedicated to safeguarding organisations in today’s digital landscape. We help monitor and manage your organisation’s security infrastructure 24/7, so you can make sure all threats and issues are dealt with.
- Select an option in the menu on the left

Protect & Manage
- Our managed security services act as an extension of your organisation and provide a team of security professionals to monitor cyber threats, defend your critical digital assets and react to security issues in real time.
- Overview
- Managed Infrastructure Services
- Cyber Engineering
Detect & Respond
- We not only monitor for security breaches but also prepare for a breach and react swiftly if one occurs. By anticipating and simulating a range of scenarios, we ensure your digital systems are as resilient as possible.
- Overview
- Extended Detection & Response (XDR)
- Cyber Incident Response Services
- Compromise Assessments
Consultancy & Advisory
- Our professional cyber security consultation services help your organisation overcome its security challenges and advise on how best to enhance your security posture with a risk aligned approach.
- Overview
- Maturity and Transformation
- Compliance
- vCISO
- Penetration Testing & Attack Simulation
- Data Privacy & Protection

Who We Are
- Since 2003 we’ve been at the forefront of delivering robust cyber security solutions to businesses across the UK. We provide dependable and advanced security measures to safeguard your business in the ever-evolving digital landscape.
- About Us
- Partners
- Join Us
Resources
- Find the latest news, events, thought leadership articles, downloads and case studies from across the cyber security industry, all written by our experienced team of experts at Reliance Cyber.
- Case Studies
- Research & Thought Leadership
- News & Events
- Technical Blogs
- Resource Hub

Contact us
- We’re always happy to answer your questions and set you on the path to better security. Plus, you can also sign up for a free 30 minute cyber security consultation.
Emergencies
- Are you experiencing a cyber security breach? Get our emergency phone number and find out how we can help you.

World-leading cyber security expertise since 2003

News & Events

Jenny Kalenderidis appointed Executive Chair of the Board at Reliance Cyber

Giulia Foss - 28 May 2025

London, UK – 28^th May 2025 – Reliance Cyber is proud to announce the appointment of Jenny Kalenderidis as the new Executive Chair of the Board. With over three decades of leadership experience in the cybersecurity and technology sectors, Jenny brings a wealth of expertise and strategic insight to the company at a pivotal time in its growth.

Jenny’s distinguished career includes senior leadership roles at some of the world’s most innovative technology firms. She most recently led the Microsoft Modern Work Division in the UK, and previously served as Vice President for the UK and Ireland at Splunk, and Regional Director at RSA (EMC). Her professional focus has spanned business transformation, generative AI applications, cybersecurity and high-performance team development.

“We are thrilled to welcome Jenny as Executive Chair,” said Brian Kingham, Founder of Reliance Cyber, “Her vision, energy, and deep industry knowledge will be instrumental in guiding Reliance Cyber through its next phase of innovation and expansion.”

For media inquiries or to request an interview, please contact:
Guilia Foss: guilia.foss@reliancecyber.com