- Pressley Ridge Schools
- Primary Care Health Services,Inc.
- Pro-Com Systems
- Progress Financial Corp.
- Project Management Institute
- Provident Agency
- PRWT Services, Inc.
- Punxsutawney Area Hospital
- Quaker Chemical Corp
- Quality Fabricating Inc.
- Quest Diagnostics Incorporated
- R and B, Inc.
- Radian Group, Inc.
- Rait Investment Trust
- Rapidigm
- RAR Engineering Group, Inc.
- Reading and Berks County Visitors Bureau
- Reading Hospital
- Recruitech Int'l
- Reed Smith L.L.P.
- ReedSmith LLP
- Reese Lower Patrick and Scott Architects
- Residence Inn Oakland, Pittsburgh PA
- Residence Inn Pittsburgh Airport, N. Fayette Township PA
- Residence Inn, Cranberry Township, PA
- Resource America, Inc.
- Respironics
- Rex Medical
- Richard King Mellon Foundation
- Riddle Hospital
- River Valley Health and Dental
- Riverview Towers I
- Rockhill Mennonite Community
- RoData Inc.
- Rohm and Haas Co.
- RohMax USA, LP
- Rosemont Presbyterian Village
- Ross Bianco Architects P.C.
- Roxborough Memorial Hospital
- RSH Architects
- RT Patterson Company, Inc.
- Rural Health Policy Center
- Rydal Park of Philadelphia, Presbytery Homes Inc.
- Safeguard Scientifics Inc.
- Saint Vincent Health System
- Saint Vincent Outpatient Center - Union City
- Sargent Group
- Sauer Inc.
- Saxonburg Coffee & Tea
- Schneider Downs and Company Inc.