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Derek Josephson, RRC, RRO, REWO

Senior Consultant

Contact Info

503-280-8759

Expertise Highlights

Prior to joining PRC in 2013, Derek developed a broad range of practical experience working as a general contractor installing building envelope systems in residential and light commercial applications. Derek E. Josephson brings over 20 years of experience in the construction industry including 13 years as a practicing envelope consultant. His expertise includes knowledge of numerous roofing and waterproofing systems including built-up roofing, modified bitumen, single ply, fluid-applied systems, and a variety of steep slope roof systems. Derek is highly experienced and provides project management and design services for building envelope projects, detailed investigations and assessments of existing building envelope assets, and performs quality assurance / quality control inspections for various construction projects.


Derek is a Senior Consultant and one of our key team leaders and is well respected by clients and his peers.


  • Kirkwood Community College, Cedar Rapids, IA, Business Administration coursework

  • Member of the International Institute of Building Enclosure Consultants (IIBEC)

  • Member of the Portland Chapter of IIBEC

  • Registered Roof Observer (RRO), a professional registration program established by IIBEC

  • Registered Roof Consultant (RRC), a professional registration program established by IIBEC

  • Registered Exterior Wall Observer (REWO), a professional registration program established by IIBEC

  • Past Treasurer and Committee Member for Portland Chapter of IIBEC

Derek Josephson, RRC, RRO, REWO

Request a discovery call

We invite you to book a complimentary discovery call so that we can learn more about your needs, and see how we can help. We look forward to hearing from you!

Professional Roof Consultants, Inc. is an independent building envelope consulting firm providing roofing, waterproofing, and exterior wall consulting services for the Pacific Northwest and beyond. For over 30 years, PRC has helped building owners, property managers, architects, and contractors minimize risk and maximize value, offering the highest quality service with unparallelled commitment.

Professional Roof Consultants, Inc.

606 SE 9th Avenue
Portland, OR 97214

INDEPENDENT CONSULTANTS FOR ROOFING | WATERPROOFING | EXTERIOR WALLS

Thank you to photographer, Erin Fortin. 

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