We're seeking an experienced Senior Office Administrator with proven procurement management expertise to deliver exceptional office support and drive efficient vendor management in a high-profile international environment. Job Title: Senior Office Administrator Location: Belgravia, London Pay: £19 - £21 per hour Duration: 6-12 months (Maternity Cover) Hours & Work Schedule: Monday - Friday, 8:30am-5:30pm (flexibility often required for business needs) Start Date: April 2026 Role Purpose To provide best-in-class office and administrative support to a high-profile international office, while ensuring the effective management of procurement activities in line with approved policies and procedures. The role is responsible for overseeing vendor performance, ensuring timely and high-quality delivery of services, and maintaining compliance with procurement guidelines across all departments, requiring a high level of professionalism, discretion, and attention to detail. Responsibilities Deliver exceptional office and administrative support within a fast-paced, high-profile environment. Support the preparation of action trackers, procurement logs, and management actions, ensuring compliance with procurement procedures outlined in the Manual. Report spending on the company credit card and assist with due diligence support for procurement processes. Prepare RFP and NDU documents for the Head of Operations' approval, ensuring alignment with sustainability goals. Manage supplier performance and utility bills, and maintain company insurance policies, including employer's liability. Skills/ Experience Required Must have vast Office Administration experience Must have experience with drafting important documents i.e NDU Strong commercial acumen Proven procurement management expertise- including vendor management Proficiency in MS Office (Excel and PowerPoint) Excellent time management and prioritisation skills Strong written and verbal communication Highly organised with the ability to multitask effectively Ability to work well under pressure in a high-profile setting. Any experience working with international clients or offices is a bonus High level of discretion and confidentiality Must be able to successfully complete background and security checks Adecco acts as an employment agency for permanent recruitment and an employment business for the supply of temporary workers. The Adecco Group UK & Ireland is an Equal Opportunities Employer. By applying for this role your details will be submitted to Adecco. Our Candidate Privacy Information Statement explaining how we will use your information is available on our website