Senior Security Analyst

About the role

As a Senior Security Analyst, you’ll play a key role in strengthening and evolving security across our branch systems. You’ll help drive improvements to our IT security controls using a layered defence approach, ensuring systems remain secure, resilient and compliant.

You’ll take the lead on identifying and managing vulnerabilities, coordinating patching and upgrades, and investigating security incidents. You’ll also support the wider team by providing technical guidance, mentoring colleagues and helping shape how we deliver secure, reliable technology.

This is a hands-on and collaborative role where you’ll work closely with teams across Booker and Tesco, as well as third-party partners, to keep our operations running smoothly and securely.

Main Responsibilities

• Drive and improve IT security controls across Booker systems
• Plan and manage patching and software updates in line with security standards
• Identify, assess and remediate vulnerabilities, risks and security gaps
• Lead investigations into security incidents and provide clear recommendations
• Act as a technical escalation point for complex security issues
• Ensure systems are secure, compliant and accurately maintained
• Support day-to-day service delivery and coordinate workload across the team
• Lead delivery of small to medium security projects and improvements
• Maintain high-quality documentation aligned to audit and compliance standards
• Build strong relationships with stakeholders, suppliers and colleagues
• Provide mentoring, guidance and line management support to junior team members

You will need

• Experience working in IT security within a production or enterprise environment
• Hands-on knowledge of security technologies such as firewalls, SIEM, endpoint protection or MDM tools
• Understanding of network security, authentication and threat mitigation
• Experience supporting and securing Linux-based systems
• Strong problem-solving skills and the ability to make decisions in fast-paced environments
• Excellent communication and stakeholder management skills
• Knowledge of governance, risk and compliance principles
• A collaborative and inclusive approach to teamwork and leadership
• Ability to balance immediate operational priorities with longer-term security improvements

What's in it for you

At Booker, along with being a great place to work and giving you an opportunity to get on in your career, we also offer the following fantastic package of benefits:

• A Booker colleague card with 10% off purchases at Booker and double discount events up to three times a year.
• After 3 months service, a Tesco colleague discount card with 10% increasing to 15% off most purchases at Tesco for a 4 day period after every four-weekly pay day, ie. thirteen times a year. In addition to 10% off at Tesco Cafe and 20% off all F&F purchases.
• 10% off pay monthly & SIM only deals with Tesco Mobile for yourself, along with further great deals through-out the year.
• Up to 30% off car, pet and home insurance at Tesco bank. Terms and conditions apply.
• Free eye test when you spend £50 or more. You can also save 30% when you spend £50 or more on glasses, prescription sunglasses and contact lenses.
• 50% off health checks at Tesco Pharmacy.
• Exclusive access to discounted RAC breakdown cover rates
• An exclusive deals and discounts website saving you money on everyday purchases including a cycle to work scheme.
• After 3 months service, you can join our annual Save As You Earn share scheme which allows you to buy Tesco shares in the future at a discount.
• Retirement savings plan (pension) - save up to 5% and Booker will match your contribution.
• Life Assurance - You are covered for death in service life cover of up to three times annual pay
• Health and Wellbeing support and resources including our 24/7, confidential Employee Assistance Programme and Virtual GP for you and your family.
• A great holiday package