Administrative Assistant

About the role

Ameresco, Inc. (NYSE: AMRC) is a leading energy infrastructure company delivering integrated solutions that provide reliable power and modernize infrastructure. Since 2000, we have served as a trusted partner to public and private sector customers across North America, the UK and Europe, delivering over $15 billion in solutions and contracting more than 5 GW of energy resources. At Ameresco, we integrate energy resources and modernize the built environment through innovative infrastructure solutions that improve reliability, optimize performance, strengthen resilience, and support long-term sustainability. Join us in building the infrastructure that powers the future. Explore opportunities to make a meaningful impact while growing your career with a company at the forefront of energy innovation. Ameresco has an opportunity for an Administrative Assistant to support our team at the Savannah River industrial complex near Aiken, South Carolina.

Responsibilities

• Serve as the primary point of contact for visitors, vendors, and government representatives, ensuring a professional and welcoming experience.
• Answer and route incoming telephone calls with professionalism and excellent customer service.
• Review, monitor, and process vendor invoices and purchase requisitions for approval.
• Manage office and janitorial supply inventories by tracking stock levels, forecasting needs, placing orders, and verifying deliveries.
• Receive, sort, and distribute incoming mail, packages, and other deliveries.
• Prepare, format, and distribute correspondence, reports, memos, letters, and forms.
• Assist with the preparation, compilation, and submission of regularly scheduled reports.
• Perform weekly quality assurance reviews and submit payroll records to Corporate.
• Maintain, update, and distribute company contact lists to ensure accuracy and accessibility.
• Organize and maintain shared drive folders and files, ensuring information remains current and properly documented.
• Create, update, and analyze reports using Microsoft Dynamics 365, Excel, and PowerPoint.
• Coordinate and support multiple projects and administrative tasks, including campus errands, document delivery, badge office visits, and other operational needs.
• Develop and maintain knowledge of Department of Energy (DOE) requirements, ensuring compliance with established protocols and implementing updates as needed.
• Handle sensitive and confidential information with the highest level of discretion and professionalism.
• Provide general administrative and operational support to the team and leadership.
• Other duties as assigned.

Requirements

• High school diploma or equivalent required.
• Minimum of five (5) years of administrative support experience, preferably within construction, engineering, manufacturing, industrial, accounting, or professional services environments.

Qualifications

• Advanced proficiency with Microsoft Office Suite, including Outlook, Word, Excel, PowerPoint, and Teams.
• Strong verbal and written communication skills, with the ability to interact professionally with employees, customers, vendors, government representatives, and leadership.
• Experience scheduling and coordinating meetings, managing calendars, and supporting virtual collaboration through Microsoft Teams.
• Excellent organizational, time management, and prioritization skills, with a proven ability to meet deadlines in a fast-paced environment.
• Working knowledge of procurement, purchasing, invoicing, payroll administration, and basic accounting processes.
• Strong customer service mindset with the ability to respond promptly and effectively to changing business needs.
• Experience maintaining electronic records, shared drives, and document management systems.
• Demonstrated ability to manage multiple priorities, coordinate administrative processes, and support day-to-day office operations.
• Experience handling sensitive and confidential information with discretion and professionalism.
• High attention to detail and commitment to accuracy in reporting, recordkeeping, and administrative processes.
• Ability to adapt quickly, manage competing priorities, and work independently with minimal supervision.
• Willingness and flexibility to work additional hours when business needs require.
• Ability to review confidential US