Four high-energy, team-based work environments.


Custom Processing Services — proud to offer toll processing services from our Southeastern Pennsylvania locations

Custom Processing Services’ corporate headquarters and three manufacturing centers (Plants 1, 2, and 3) are all located in the Exeter Industrial Park at our Reading, Pennsylvania, campus. Our corporate mailing address is 2 Birchmont Drive, Reading, PA 19606. A fourth facility is located in East Greenville.

Additional Resources: 

Plant 1

Plant 2 and Corporate Offices

  • 40,000 ft2 with high-bay manufacturing
  • Jet milling: numerous micronizing stations, each with a different capacity/orientation
  • Technical-grade test milling
  • Quality assurance lab
  • Corporate functions: accounting, sales and marketing, logistics and transport, customer service, human resources
  • Warehouse space for flexible shipping
  • Ample capacity: eight loading docks
  • Facility-wide sprinkler system

Plant 3

  • 45,000 ft2 with high-bay manufacturing
  • Botanical and essential oil extractions
  • cGMP Processing: customizable clean rooms, GMP blending, GMP laboratory, high-potency compounds
  • cGMP fluidized bed jet milling
  • Covered loading docks for safe handling of products
  • Warehousing
  • Deliveries report to Plant 2 (main office)

East Greenville Plant

  • 80,000 ft2
  • Coarse processing operations: jaw crusher, pulverizer, industrial drying equipment
  • Fluidized bed jet milling
  • Hammer milling
  • Blending
  • Two warehouse buildings
  • Outdoor storage of bulk materials
  • Rail car siding – interchanges with Norfolk Southern and CSX
  • Segregated warehouse (indoor), bulk storage, and handling
  • Accessible from the NE Extension of the PA Turnpike (I-476) and PA Routes 63 and 29
  • Mailing address: 461 State Street, East Greenville, PA 18041

Our Quality Commitment

In addition to our analytical laboratory services, Custom Processing Services relentlessly follows specific best practices to achieve superior quality time after time.

  • Striving to exceed customers’ expectations and requirements
  • Continually improving the effectiveness of the quality management system
  • Committing to the requirements of the ISO 9001 quality system
  • Complying to cGMP, the FDA standards that ensure a safe and quality process, avoid contamination, and assure repeatability
  • Having an established HACCP system that controls biological, chemical, and physical hazards for product safety


Our customers trust us to process and manufacture products that meet their own standards for quality. Integrity in our processes is the basis for that trust. Our quality and process management certifications prove our commitment to quality and ensure every product we touch meets rigorous safety standards. We hold certifications in ISO 9001, FSSC 22000, GMP, Hemp GMP, and PCO Organic. We are also an approved contract manufacturer for Kosher processing via the Orthodox Union.

For more information on any of our certifications, just click the icon below.

GMP ISO 9001 Certified GMP_Certificate ISO_9001_Certificate.pdf