Project Administration & Billing Coordinator

Eastern Sierra Engineering, a Civil Solutions Company, is seeking a highly organized and detail-oriented Project Administration & Billing Coordinator to join our growing team. This role will play a critical part in supporting day-to-day operations across project administration, billing coordination, onboarding support, and general office operations. The ideal candidate thrives in a fast-paced environment, enjoys managing multiple priorities, and can effectively support both field operations and internal office teams. This position is best suited for someone who is proactive, dependable, highly organized, and able to bring structure and follow-through to a dynamic construction and engineering environment. At Eastern Sierra Engineering, we are dedicated to “Engineering the Earth” by delivering innovative solutions that improve the quality of life for the communities we serve. As a leading firm in civil engineering, geotechnical engineering, construction management, and mix design development, specializing in airports, roadways, and public works projects, we are committed to excellence, safety, and superior client service. WHY WORK WITH US? Competitive pay with growth opportunities. Supportive environment that focuses on personal development. Bonus opportunities based on team and company performance. Company-paid health insurance for employees. Diverse and challenging projects to help build your expertise. RESPONSIBILITIES: Project Administration & Billing Support Support project managers and operations teams with project-related administrative tasks and billing coordination. Assist with invoice preparation, tracking, and ensuring timely submission of project billing information. Perform high-volume data entry while maintaining strong attention to accuracy and detail. Help organize and maintain project documentation, records, and reporting. Onboarding & Employee Coordination Support onboarding efforts for new hires by assisting with onboarding paperwork, coordination, and employee setup processes. Serve as a point of contact to help employees navigate onboarding procedures and required documentation. Coordinate onboarding-related communication between field staff, operations teams, and office personnel. Administrative & Office Support Provide general office and administrative support across multiple departments. Answer phones, respond to emails, and assist with day-to-day office operations. Assist with scheduling, document management, filing, and office organization. Support internal teams with operational and administrative needs as assigned. Collaboration & Communication Work closely with project managers, field staff, accounting, and leadership teams to help maintain efficient workflows and communication. Communicate professionally with employees, clients, vendors, subcontractors, and other stakeholders. Assist with special projects and process improvement initiatives as needed. REQUIREMENTS: 3-5 years experience in administrative support, project administration, billing coordination, office operations, or a related role preferred. Strong attention to detail, organizational skills, and ability to multitask effectively. Excellent written and verbal communication skills. Ability to work independently and manage competing priorities in a fast-paced environment. Proficiency in Microsoft Office Suite, particularly Outlook and Excel. Familiarity with invoicing systems, ERP systems, QuickBooks, or similar software is a plus. Positive attitude, strong work ethic, and willingness to learn. Experience within construction, engineering, contracting, or a related industry is strongly preferred. We are an Equal Opportunity Employer. All applicants will be afforded equal opportunity without discrimination because of race, color, religion, sex, sexual orientation, marital status, order of protection status, national origin or ancestry, citizenship status, age, physical or mental disability unrelated to ability, military status, an unfavorable discharge from military service, or any other protected category. We maintain a drug-free workplace and reserve the right to perform pre-employment substance abuse testing and background verification checks.