Senior Category Manager

Join One Advanced

This is a high-impact opportunity to take full ownership of key procurement categories across HR and Professional Services, partnering closely with senior stakeholders to drive strategic value across the business.

If you thrive in a fast-paced environment and want to play a visible, influential role in shaping a growing function, this is your chance to make a lasting impact.

This is a hybrid role, with an expectation of 2–3 days per week in our Birmingham office, in the Mailbox.

• Own and deliver category strategies across HR and Professional Services, driving commercial value and efficiency
• Lead end-to-end sourcing activity, including negotiation of complex commercial and contractual agreements
• Manage supplier selection, onboarding, due diligence, and ongoing performance
• Partner with stakeholders across HR, Finance, Legal and Professional Services to influence decision making and embed procurement best practice
• Support the delivery of cost savings targets while balancing risk, quality and business needs
• Manage supplier contracts and scope to ensure strong commercial outcomes and prevent scope creep on delivery projects
• Contribute to the development of procurement processes, tools and policy as the function continues to mature
• Drive a more proactive, data‑led approach to procurement across the organisation
• Support key strategic initiatives including technology implementations and outsourced service delivery

• Strong experience in strategic supplier procurement
• Proven track record of leading complex contract negotiations, including commercial and contractual terms
• Experience across Professional Services and/or IT services procurement (e.g. implementation partners, consulting, SaaS)
• Ability to independently manage supplier agreements, working closely with Legal where required
• Strong stakeholder management skills, with the ability to influence and challenge at senior levels
• Commercially astute, with a clear understanding of cost drivers, risk and value creation
• Experience operating in fast paced or evolving environments, with the ability to manage ambiguity and competing priorities
• Resilience, pragmatism and a delivery focused mindset

Wellbeing that means something

• 26 days’ holiday + bank holidays (and the option to buy more) plus 1 paid volunteering day every year
• Exceptional family leave
  , 26 weeks fully paid maternity/adoption, 4 weeks fully paid paternity, 22 weeks fully paid shared parental leave, plus 5 days paid bereavement leave
• Robust sick pay of up to 13 weeks full pay + 13 weeks half pay
• 24/7 Employee Assistance Programme for confidential support
• Private medical insurance for everyone
  , no medical-history exclusions

Financial benefits that have your back

• Performance‑based rewards tailored to your role
  , from company-wide bonuses to OTE and commission structures
• Income protection
  : up to 75% salary for 5 years if you ever need it

Grow your career with us

• Skills Hub learning platform with leadership pathways, future‑manager training, and a huge online library
• Access to external training and apprenticeships

Making a Difference

• Match It! Fundraise for a cause close to your heart and One Advanced will match part of the funding
• Pennies from Heaven donate the pennies from your pay check to help make a difference without lifting a finger

Plus plenty other flexible benefits to suit your lifestyle on our Reward Hub, including:

• ULEV car scheme with 1,000+ models
• Dental insurance, Health Cash Plan, Critical Illness Cover, Partner Life Cover