Senior Security Engineer - IT & OT

• 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.

As part of our team, you'll enjoy a range of benefits that support your wellbeing, development and lifestyle, including:

• 33 days' holiday, including bank holidays
• Holiday purchase scheme
• 24/7 Virtual GP access
• Private medical insurance - single cover (after 12 months' service)
• Annual free at-home health testing kit (after 6 months' service)
• Access to our Employee Assistance Programme and a network of Mental Health First Aiders whenever you need support
• Workplace pension with employer contribution
• Life assurance (2x salary, after 6 months' service)
• £50 colleague product allowance on Holland & Barrett products (after 6 months' service)
• 25% colleague discount in store and online, with free delivery on online orders
• Access to cashback and discounts from a wide range of retailers
• Free Wellhub membership, with discounted access to gyms, studios and premium wellbeing apps
• Cycle to Work scheme

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.

• 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.

London or Nuneaton | Full-time | Hybrid
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.

If you're a hands-on cyber security engineer who enjoys solving complex technical challenges and wants to shape the future of IT and OT security in a purpose-led business, we'd love to hear from you.