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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Security Engineer - IT and OT - **Company:** Holland & Barrett - **Location:** UK - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Active Directory, Cyber Security, Distributed Systems, Supervisory Control and Data Acquisition (SCADA), Virtual Private Networks (VPN), Information Systems Security Architecture Professional, Network Security, Remote Access Technology, Cyber Threat Analysis, Operational Systems - **Published:** September 26, 2026 - **Apply:** https://www.totaljobs.com/job/senior-security-engineer/holland-barrett-job108044537 ## About the Role * Significant hands-on experience securing enterprise IT environments, including system hardening and secure configuration. * Strong experience working with operational, distributed or OT environments where resilience and availability are essential. * Expertise across network security, segmentation, firewalls, VPNs, identity and endpoint security. * The confidence to lead technical decisions, influence stakeholders and balance security with operational needs. * Excellent troubleshooting and problem-solving skills, with a collaborative and pragmatic approach. * Experience with technologies such as Active Directory, Entra ID, endpoint management platforms or OT technologies such as PLCs, SCADA or BMS would be an advantage. ## Description We offer hybrid working, with an expectation that you'll attend one of our Holland & Barrett offices in London or Nuneaton (or another designated location) on an ad hoc basis, as required for business needs. Back your career. Back every body At Holland & Barrett, we're on a mission to make health and wellness a way of life for everyone. As our Senior IT/OT Cyber Engineer, you'll play a critical role in protecting the technology that keeps our stores, warehouses and operational environments running securely. Working at the intersection of enterprise IT and Operational Technology (OT), you'll lead the design and delivery of security solutions that safeguard business-critical systems while enabling innovation. This is an opportunity to shape our IT and OT security capability, influence technical direction and make a tangible impact across a growing international business. What you'll be doing * Lead the security engineering of IT and OT environments across our stores, warehouses and operational sites. * Design, implement and continuously improve secure architectures, configurations and engineering standards. * Drive secure network segmentation, remote access and identity controls across distributed environments. * Act as the senior technical escalation point for IT and OT cyber security challenges and incidents. * Assess cyber risks, provide pragmatic recommendations and support informed business decisions. * Partner with infrastructure, engineering, operations and facilities teams to embed security by design. * Mentor colleagues, share technical expertise and help develop security engineering best practice. * Stay ahead of emerging cyber threats and continuously improve our security tooling and capabilities. ## Related Videos - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [MCP Mashups: How AI Agents are Reviving the Programmable Web](https://www.wearedevelopers.com/videos/1392-mcp-mashups-how-ai-agents-are-reviving-the-programmable-web) - [Small, Secure, Interconnected: The next Internet Protocol](https://www.wearedevelopers.com/videos/100062-small-secure-interconnected-the-next-internet-protocol) - [Thinking Differently - How to Make Money from Cyber Attacks & Cheats](https://www.wearedevelopers.com/videos/745-thinking-differently-how-to-make-money-from-cyber-attacks-cheats) - [You can’t hack what you can’t see](https://www.wearedevelopers.com/videos/41-you-can-t-hack-what-you-can-t-see) - [Cyber Security: Small, and Large!](https://www.wearedevelopers.com/videos/259-cyber-security-small-and-large) ## Related Articles - [Best Companies in the Netherlands: Top 25 Companies in 2023 ](https://www.wearedevelopers.com/magazine/193-best-companies-in-the-netherlands-top-25-companies-in-2023) - [9 Ways to Make Money Hacking](https://www.wearedevelopers.com/magazine/333-9-ways-to-make-money-hacking) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Events like RSAC Get You CISOs. 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