Administrative Assistant

Administrative Assistant

Post Date:
Feb 25, 2026

Location:

Maryville, MO 64468

Position Type:
Full Time

Requisition Number: 33894

Work Schedule:

Monday - Friday

Gateway Foundation, Inc. is a national non‑profit dedicated to helping individuals with substance use and mental health disorders. Established in 1968, Gateway provides essential tools and knowledge for recovery, positively impacting hundreds of thousands of lives. Operating through its Community Services, Corrections Divisions, and Corporate Headquarters, the organization is recognized for innovative, effective treatment approaches and maintaining high standards.

Consider joining our team, where your impact can be truly meaningful. Our organization focuses on delivering high quality clinical services as a recognized leader in evidence‑based treatment proven to get results. By joining our team, you'll have the chance to provide essential services to underserved populations, all while working for an organization that values you and aims to be an employer of choice.

You can expect to be part of a vibrant culture that emphasizes teamwork and professional growth. When you join us, you'll discover personal and professional fulfillment by aligning your career with your values.

Perks of working in correctional healthcare:

• Opportunity to make a positive impact on a marginalized population
• Exposure to diverse patient demographics
• Focus on driving change, tracking progress, and improving care
• Development of skills in a unique healthcare setting

Performs office and administrative support duties including composing and typing correspondence and documents, compiling data and preparing summary reports, processing routine financial transactions and billing information, maintaining record keeping and filing systems, scheduling meetings and conferences, and receiving and screening visitors and telephone calls. Serves as administrative liaison between assigned department/center and other Gateway components by gathering and exchanging information related to operational, budget, payroll or personnel issues and procedures.

• Composes and types a variety of materials and documents including correspondence, memos, forms, tables, records, and charts from rough draft, general directions, or dictation; using standard computer word processing, database and spreadsheet applications. Proofreads and edits final draft materials for accuracy, consistency and clarity.
• Compiles data from a variety of sources such as logs, lists, invoices and treatment records, and prepares regular summary reports for use by supervisors in monitoring and tracking income, expenses and contract compliance.
• Responsible for administering or processing routine financial transactions such as petty cash, bank deposits, receipts, ledgers, client personal funds, pass money, and so forth.
• Depending on area assigned, may assist in processing billings by logging and coding treatments and services, recording treatment hours, or entering required information into records and databases.
• Maintains record keeping and filing systems including records related to clients, personnel, payroll, attendance, work and purchase orders, and so forth.
• Completes requisitions for approved office supplies, and standard department/center inventory as requested. Accepts receipts and invoices for non‑routine expenditures, and obtains necessary authorizations for payment.
• Schedules meetings and appointments. Makes routine travel and conferences arrangements as directed.
• Serves as administrative liaison between assigned program or department and central offices and services by gathering and exchanging information related to operational, budget, payroll or personnel issues and procedures.
• Receives and screens visitors and telephone calls, and notifies appropriate personnel, or records messages.
• Performs a variety of general office and administrative duties such as photocopying and assembling documents, sorting and distributing mail and faxes, storing office supplies, processing…