Description We are seeking an experienced HR/Payroll Administrator to join an established organization in the Greater St. Louis Metro area. This role plays a key part in supporting the full employee lifecycle, including onboarding, benefits administration, employee relations, compliance, and HR operations, while also overseeing full‑cycle payroll processing. The ideal candidate is an organized, people‑focused professional with strong HR expertise, a solid understanding of payroll processes, and the ability to partner effectively with employees and leadership. Responsibilities: + Oversee and process weekly payroll for contract, commissioned, and salaried employees, ensuring accuracy, compliance, and timely execution. + Serve as a primary point of contact for employee questions related to payroll, benefits, policies, and HR processes, providing clear and supportive guidance. + Manage and maintain accurate employee records, including new hires, terminations, status changes, compensation updates, and benefit elections. + Coordinate and support new hire onboarding and orientation, ensuring a smooth and compliant employee experience. + Administer benefits programs, including enrollments, changes, deductions, and coordination with vendors. + Ensure accurate timesheet collection, review, and approval in alignment with company policies and labor regulations. + Conduct regular audits of payroll, benefits, and HR data to ensure compliance with federal, state, and local regulations. + Prepare payroll, HR, and compliance reports for management and leadership as needed. + Track and support performance evaluation processes and employee documentation. + Partner with leadership to support HR initiatives, compliance efforts, and process improvements. Requirements - A minimum of 5 years of experience in HR and payroll administration. - Proficiency in multi-state payroll processing and a strong understanding of labor laws and statutory deductions. - Hands-on experience with benefits administration and employee relations. - Familiarity with HRIS and payroll systems. - Exceptional attention to detail, organizational skills, and the ability to maintain confidentiality. - Strong knowledge of full-cycle payroll processes, including garnishments and compliance requirements. - Excellent communication skills to effectively collaborate with employees and leadership Robert Half is the world's first and largest specialized talent solutions firm that connects highly qualified job seekers to opportunities at great companies. We offer contract, temporary and permanent placement solutions for finance and accounting, technology, marketing and creative, legal, and administrative and customer support roles. Robert Half works to put you in the best position to succeed. We provide access to top jobs, competitive compensation and benefits, and free online training. Stay on top of every opportunity - whenever you choose - even on the go. Download the Robert Half app (https://www.roberthalf.com/us/en/mobile-app) and get 1-tap apply, notifications of AI-matched jobs, and much more. All applicants applying for U.S. job openings must be legally authorized to work in the United States. Benefits are available to contract/temporary professionals, including medical, vision, dental, and life and disability insurance. Hired contract/temporary professionals are also eligible to enroll in our company 401(k) plan. Visit roberthalf.gobenefits.net for more information. © 2025 Robert Half. An Equal Opportunity Employer. M/F/Disability/Veterans. By clicking "Apply Now," you're agreeing to Robert Half's Terms of Use (https://www.roberthalf.com/us/en/terms) and Privacy Notice (https://www.roberthalf.com/us/en/privacy) .