Office Administrator

The Office Administrator is responsible for overseeing administrative functions, HR, accounting, and operational support for their local office. This role ensures compliance with corporate policies and processes payroll, accounts payable/receivable, benefits, and employee records. Responsibilities Performs accounting, human resources, and other administrative duties with supervisionProcesses payroll, accounts payable, accounts receivable, and invoicingTracks and documents the petty cash/corporate credit card accounts by writing checks, requesting replenishments, and reconciling bank and internal accounting balancesProcesses new hires, job changes, pay rate changes, and terminationsCompletes various human resource-related forms, such as employment verification paperworkTracks immigration status and updates I-9s as requiredProcesses benefits (including new enrollments, open enrollment, and updates as required)Assists with warning reportsProcesses leaves of absence and short-term disability claimsAssists with other HR issues as neededMaintains and updates certificates of insuranceEnters vendor invoices into the accounting system accurately and timelyReconciles vendor statements and resolves discrepanciesGenerates and sends invoices to customers in accordance with contract termsMonitors outstanding invoices and ensures accurate records are maintainedFollows up on past-due accounts via phone and emailWorks with customers to resolve billing issuesMaintains accurate records of collection efforts and provides reports on aging receivablesOversees building and equipment maintenanceResponsible for computer network supportSupports receptionists and administrative management of the officeOther duties as assigned Required Qualifications 2 years of experience of HR and payroll experience with an HR degree or 4 years of HR and payroll experience without an HR degreeHigh school diploma or GED required. Bachelor's degree (HR related) preferredIf driving for or on behalf of any ECS subsidiary, a valid driver's license is requiredDependable, detail-oriented, and organizedAbility to multi-task and meet deadlinesProficiency with computers and MS OfficeA team player with excellent oral and written communication skillsExcellent communication skills to effectively collaborate across different departmentsAbility to work independently while maintaining alignment with corporate and subsidiary objectivesMust be available during core working hoursThis is not a remote position Military Qualifications The following US Military ranks will qualify for this position IF they also meet the education, certification, and licenses requirements from the above section titled "Required Qualifications":E-4 The expected pay range for this role and location is $35-$39/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 building science + infrastructure consulting services. We are employee-owned with more than 3,200 employees in 125 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 #38 in Zweig Group’s Hot Firm List (June 2026). For additional information about ECS, visit: www.ecslimited.com. ECS is an Equal Opportunity Employer. To learn more, click here.