US Senior Payroll AdministratorSalary: 45-60kPostcode - EC4R 9AT1-2 days in office (negotiable)Start date ASAPPermanent roleWorking for our client means being a trusted payroller at the centre of a fast-paced, people-first organisation. You''ll support a global workforce by delivering accurate, compliant, end-to-end payroll while partnering closely with contractors, internal teams, and leadership. This role suits someone who thrives on precision, deadlines, and problem-solving - and who takes pride in getting the details right the first time.You''ll join a culture built on clarity, consistency, and collaboration, where coaching-led leadership, transparent communication, and psychological safety are part of everyday working life. Our client''s commitment to developing its people means you''ll have the tools, autonomy, and support to grow your expertise while contributing to a business powering progress across the energy and infrastructure sectors.Requirements:5+ years of US payroll experienceExperience in an employee-facing capacity with good communication skillsAbility to work under tight deadlines with analytical and problem-solving skillsStaffing experience a plusSoftware experience:Microsoft Excel (pivots and v-lookup needed, macros a plus)ADP Workforce NowBullhorn experience a plusTempest experience a plusResponsibilities:Weekly payroll processing functions including timesheet and expense retrieval and audit/corrections, missing timesheet and approvals follow up, reconcil