The chapter’s Board of Directors, together with committee leaders and members, runs each chapter’s day-to-day activities.

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.

Jerome L. Jeffers, II

Jerome Jeffers has over 45 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.

Max Calehuff

Max Calehuff works with HB Fuller – one of the world’s leading adhesive and sealant manufacturers.  Max has been working in the roofing industry on the manufacturing side for over four years.  He has experience on the labor side of roofing and inspections for both commercial and residential projects.

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.

Rob Worthing
Immediate Past-President

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 Siplast 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.

David Markman
Director at Large-Consultant

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.


Allen Light
Director at Large – Consultant

Allen is a skilled professional with over 35 years of experience in the roofing and construction industries, with the last two decades dedicated to roofing. Allen is experienced with a broad range of roofing projects, from overseeing residential re-roofs on family-owned properties to managing multi-million dollar roof replacement projects.

Jamie Rees
Director at Large-Industry

Jamie began his career in construction at the age of 15 years old when he began working for Michael Knight crafting custom staircases. Jamie earned his Fire Science Degree and attended Butte’s 38th Fire Academy, where he graduated with high honors. After college Jamie continued his work as a first responder for 5 years.

In 2008, Jamie became a Project Manager for DM Construction Services in SoCal. Jamie obtained his General Contractors License and launched his career in mitigating damages caused by water intrusion. In 2013, he joined Lowry’s Specialty Distribution, where was able to expand his product knowledge on exterior building envelope systems and solutions.  He is now one of the founding partners of RAM Independent.

Thomas Berger
Director at Large-Consultant

Thomas (Tom) Berger has over 36 years of experience in the architectural design and construction industry.  He is both a co-founder and the Managing Principal of DTR Consulting Services, Inc.  Tom has sat on various professional organization boards, as well as being expert topic presenter, and believes in promoting professional development across the industry.  Before founding DTR in 2002, his experience ranged from an Architectural Project Manager, Construction Administrator, Field Inspector, CM Program Manager, Carpenter, Facilities Planning Manager, Technical Specifier, Forensic Investigator, and Architectural Office Leader in various national A/E firms.  Tom leads his firm in assisting design clients in the appropriate selection of building materials, including exterior façade assemblies, roof assemblies, and below-grade assemblies.

Noah Metz

Noah Metz
Director at Large-Industry

Strategic and creative Sales Director for Beacon Waterproofing West Region – South District. Noah has a strong background in Consultative Selling and Prospecting. Consistent history of Closing New Business and Relationship Building through all levels of management. Skilled in Project Analysis and Planning to achieve maximum client satisfaction. Strong acumen for Job Bidding to maintain continued growth margins.

Joseph Buccini

Joseph Buccini
Director at Large-Consultant

Joseph Buccini specializes in design consulting, assessment, and repair of exterior envelope systems as well as the restoration, repair, and renovation of historic structures. His experience ranges from peer review services to full building enclosure design for exterior envelope systems and from creation of feasibility studies to complete survey and repair documents for historic preservation projects.

Since joining WJE, Mr. Buccini has participated in a variety of projects, including architectural field investigations, water intrusion investigations, demolition and construction documents for roofing and waterproofing repairs, glass failure investigations and reports, energy modeling for new high- and mid-rise construction, and drawings and specifications at all phases of project development.

Julie McDonald
Region V Director

I have always been passionate about buildings. Their height, strength, and endless possibilities encouraged me to pursue a career in construction management and building envelope consulting. I have been in this industry for 15 years and believe firmly in the importance of high quality and safety when it comes to buildings.

The building envelope is the most important asset of the building. I love the form and function of buildings and the ability to keep the outside out, and the inside in. I help building owners and developers achieve their standards of high level building performance and constructing buildings according to plan. I bring with me a highly trained and organized team of industry experts to help take the weight and stress off of the building owner.