Office Administrator Assistant

Administrative AssistantAssist with processing payroll, accounts payable/receivable, and invoicingSupport new hire processes, job changes, and terminationsComplete and file HR forms (e.g., employment verifications, I-9s)Assist with benefits processing and leave administrationEnter vendor invoices and reconcile statementsSupport billing and collections effortsHelp maintain office equipment and supply inventorySupport general office administration and receptionist dutiesAttend meetings and participate in required trainingsOther duties as assigned to support learning and office operationsHigh school diploma or GED required.Associate degree or coursework in business, accounting, or human resources preferred.1 year of ECS administrative experience. This role is designed for individuals looking to grow into an Office Administrator position and will include training across all key job functions.The expected pay range for this role and location is $19-$21/hour. The final agreed-upon compensation will be determined based on specific location and other individual qualifications.ECS Group of Companies (ECS) was founded in 1988 with the goal to raise the standards of professional engineering consulting. Today, we are a leader in geotechnical, construction materials, environmental and facilities consulting services. We are employee-owned with more than 3,000 employees in 100+ offices and testing facilities coast to coast. ECS is currently ranked #60 in Engineering News-Record's Top 500 Design Firms (April 2026), #148 in Engineering News-Record's Top 200 Environmental Firms (October 2025) and #50 in Zweig Group's Hot Firm List (May 2025). For additional information about ECS, visit: is an Equal Opportunity Employer.