- Homeland Center
- Homeward Bound Services, Inc.
- Hospital Council of Western Pennsylvania
- Hospital of the University of Pennsylvania
- Houghton International
- HREngineer
- Hunter Associates
- Hunter's Truck Sales and Service Inc.
- Huntingdon County United Way, Inc.
- Hussey Copper
- IBEW Local 1919 - Journeyman Tree Trimmers
- ICG Communications
- iGate Corporation
- IIAM
- IKM Inc.
- Ikon Office Solutions
- Impact Solutions, Inc.
- Impella
- Independence Blue Cross
- Indiana Regional Medical Center
- Indiana University of Pennsylvania
- Information Systems Services
- Innovative Print and Media Group, Inc.
- InSight 3
- Integrated Circuit Systems Inc.
- Interdigital Communications Corp.
- Intex Corporation
- Iron Age Corp.
- Iron Mountain Secure Shredding
- ISG Plate, Inc.
- ITNS
- ITNS International Transplant Nurses Society)
- J.C. Blair Memorial Hospital
- James E. Van Zandt VA Medical Center
- Jeemco
- Jefferson Health Frankford
- Jefferson Hospital
- Jefferson Methodist Hospital
- Jennersville Hospital - Tower Health
- Jewish Association on Aging
- Jewish Family and Children's Service of Pittsburgh
- JLG Industries
- Johnson Matthey, Inc.
- Johnson, Kendall and Johnson, Inc.
- Johnstown Tomahawks
- Jones Apparel Group
- JSA Architects
- Junior Developments Inc.
- Kappa Alpha Psi Fraternity Inc.
- Karen Singer Tileworks, Inc.