The chapter’s Board of Directors, together with committee leaders and members, runs each chapter’s day-to-day activities.
President: David Markman
David Markman P.E. (CA) is a Senior Building Science Consultant with Morrison Hershfield’s San Francisco Bay Area office. He has enjoyed providing building science consulting on buildings ranging from single-family homes to iconic museums in his twelve-year career. David’s focus is working with clients, including Architects, Contractors, and Owners, to understand each project’s unique circumstances and design appropriate solutions.
Vice-President: Rob Worthing
After 20+ years in the Building Enclosure Consulting arena, Rob Worthing, RRC, CDT has recently taken the leap to the other side of this amazing industry. Rob is the District Manager for Sipalst covering Northern California and Northern Nevada.
As a Registered Roofing Consultant (RRC) with a Construction Document Technology (CDT) certification Rob endeavors to find the perfect solution for his Clients’ roofing and waterproofing challenges.
Past President: Megan Cross-Wilkinson
Megan Cross-Wilkinson has 6 years of experience in the building science industry in existing buildings, new construction, and forensics/litigation. She currently works in the Oakland office at RDH Building Science Inc. and has managed projects in California, British Columbia, and Ontario, Canada. Megan holds a B.A.Sc. in Honours Environmental Engineering from the University of Waterloo in Canada. She is a member of the Association of Professional Engineers and Geoscientists in British Columbia and the California Board for Professional Engineers and Land Surveyors (PELS) in California.
Treasurer: Bill Gillette
Bill Gillette has been marketing and providing technical sales support for roofing and waterproofing systems over the past 25 years. Most recently relocating to the San Francisco Bay area in 2010.
Bill lives in Danville, CA, with his daughter, Isabella.
Director at Large – Consultant: Jonathan Stafford
Jonathan Stafford is a Senior Project Manager in the Building Technology Division of Simpson Gumpertz & Heger. Jonathan has 20 years of experience investigating and designing major commercial, institutional, and residential buildings for waterproofing issues, including roofs, plaza decks, and below-grade spaces. He consults with architects, contractors, and building owners in the design of the building envelope for new products and to analyze and repair water intrusion problems and construction defects for existing structures.
Jonathan is a licensed Professional Engineer in California and is an IIBEC Registered Roof Consultant.
Director at Large – Industry: Dave Johnson
Dave Johnson work as the Northern California District Manager for SOPREMA. Collaborating with consultants, contractors, and building owners. In his 6 years with SOPREMA, he has been responsible for sales, marketing, and contractor training.
Before joining SOPREMA, Dave worked as an architect after receiving his BS in Architecture from UW-Milwaukee.
Director at Large – Consultant: Shawn LeCrone
Shawn LeCrone, RRO, REWO, CD, has 17 years of experience in the building envelope industry, consulting, assessment, contracting, project management, designing, and planning. He has enjoyed providing building science consulting primarily for Education type buildings (K-12 and Higher Ed) and ranging from large commercial, corporate, healthcare to Multi-Family. As Vice President of California, Shawn’s focus is to provide client service for all 8 offices of PBK, and their clients assist with the building envelope design of each project.
Director at Large – Consultant: Jerome L. Jeffers, II
Jerome Jeffers has over 40 years of experience in design services for the building industry. His building enclosure experience encompasses various project types, including educational, institutional, commercial, hospitality, and residential. Jerome is a recognized expert in roofing, waterproofing, and exterior wall consulting. Mr. Jeffers provides solutions to building weatherization issues and deterioration to building structures. Mr. Jeffers has earned the Registered Building Envelope Consultant registrations from IIBEC, the most prestigious certification for the roofing, waterproofing, and building envelope consultant practice.
Director at Large – Industry: Mark Swanson
Mark Swanson has over 15 years of experience in the construction industry. For nearly a decade, Mark held a variety of roles for a global waterproofing manufacturer, including Technical Services Coordinator and Technical Sales Manager for the Bay Area; Regional Manager of the Western US; and Regional Director for Europe, the Middle East, and Africa, based in London, England. In 2017, he founded CALBERS to find optimal building envelope solutions for the Bay Area, one of the most complex and high-risk waterproofing environments.
As President of CALBERS, Mark provides innovative solutions. Working with some of the most sophisticated Owners, Consultants, Contractors, and Architects, Mark has been intimately involved in some of the most challenging waterproofing projects worldwide.