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Administrative Assistant I - Caseyville, IL

Gateway Foundation
Caseyville, IL Full Time
POSTED ON 1/28/2026 CLOSED ON 2/25/2026

What are the responsibilities and job description for the Administrative Assistant I - Caseyville, IL position at Gateway Foundation?

Who is Gateway Foundation?

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.

Why join us?

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 have the opportunity to find both personal and professional fulfillment by aligning your career with your values.

Location: Caseyville Residential Treatment Facility - 600 W Lincoln Ave, Caseyville, IL 62232, USA

Schedule: Monday - Friday, 9:00AM - 5:00PM

Administrative Assistant I responsibilities:

  • 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.
  • 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.

Job Requirements:

  • High school diploma or equivalent required
  • Minimum 1 year of experience or training in office procedures
  • Working knowledge of Microsoft Office software applications (Word and Excel) required
  • Proven customer service skills and ability to work independently as well as with a team

Physical Requirements:

  • Ability to communicate with others in order to gather and exchange information.
  • Ability to respond to telephone inquiries.
  • Ability to continually proofread, check and verify data from printed form and computer monitor display.
  • Ability to use a keyboard and video display terminal to enter, retrieve, and/or audit information and data on a continual basis.
  • Ability to pull, lift and transport files and documents to and from various locations within office or assigned location.

Compensation (based on experience and credentials):

  • $16.92 - $24.47 per hour
  • Gateway Foundation conducts annual reviews including merit increases.

Benefits at Gateway Foundation:

Health and Wellness:

  • Medical, dental, and vision insurance for employees and dependents
  • Employee wellness program promoting health and fitness and offering cash-saving premiums
  • Employee assistance programs focused on mental health

Financial Wellbeing:

  • 403(b) Retirement Plan with 3% employer match
  • Short-term and Long-term Disability and Life and AD&D Insurance paid for by Gateway
  • Flexible Spending Accounts for medical and dependent care
  • Public Service Loan Forgiveness (PSLF)

Flexibility and Time Off:

  • 18 paid time off days per year – accrual rates increase with years of service
  • 9 paid company holidays
  • Work-life-balance

Personal Development:

  • Training & Development Programs
  • Tuition Reimbursement - up to $5,250 per calendar year
  • eLearning access to online courses that provide CEU’s and job-related training
  • Clinical Supervision: Formal and informal guidance

Gateway Foundation is an Equal Opportunity Employer: Race/Color/Sex/Sexual Orientation/ Gender Identity/Religion/National Origin/Disability/Vets. Please view Equal Employment Opportunity Posters provided by OFCCP here.

Salary : $5,250

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