Indiana
- American Line Builders – Apprenticeship and Training Program
- Chart of Indiana: Apprenticeships
- Independent Electrical Contractors Association of Kentucky and Southern Indiana
- Indiana Association of Plumbing-Heating-Cooling Contractors (PHCC)
- Indiana Plan – Pre-Apprenticeship Training Program
- Indiana Union Construction Industry: Apprenticeships
- Iron Workers Local 22 (Indianapolis,IN)
- Ironworkers Local #147 (Fort Wayne, IN)
- Ivy Tech Community College – National Apprenticeship Agreements
- Learn More Indiana: Apprenticeships
- Operative Plasterers' and Cement Masons' International Association (OPCMIA) 692
- Purdue University: Division of Construction and Management – Internships
- United Association Plumbers & Pipefitters Local 166
- United Association Plumbers & Steamfitters Local 157
- United Association Plumbers and Steamfitters Local 136
- United Association Plumbers, Steamfitters & HVAC Service Technicians Local 440
