Grant Schaffer

Chapter President, Affliate Liason, & Golf Tounament Chair

Grant Schaffer, Preconstruction Director, has more than 30 years in the construction Industry. He is progressively responsible from 5 to 150 employees with company revenues from 5 to $850 million. He has spent the last 12 years in OSHPD pre-construction MEPFS design management, 14 years in project management and managing Design Assist / Design Build OSHPD Medical facilities in the plumbing and mechanical and electrical non-union and union trades to first tier construction management


Grant has served In the United States Air force multiple tours in the Gulf War, HVAC technician, Mechanical Designer for an Engineer/Architectural firm,  HVAC technician and Master Plumber for Mechanical contracting companies and General Manager, Service Coordinator, Project Manager, Preconstruction/ Estimating manager/ director for Plumbing and Mechanical divisions and Design.


He holds a Bachelors of Science degree in Project Management from Colorado Technical University, Summa Cum Laude and hold a Master Plumbers License, LEED accredited, and Architectural School at Montana State University. Currently ASPE SD President and serving on the ASPE national nominating committee.

Rod Koepke


Rod has been involved in the Building Engineering design industry for over 33 years. Beginning with HVAC and electrical systems design for 2 1/2 years, then switching to plumbing and has been at it ever since. His building design experience includes Health Care, including OR/Out Patient facilities, emergency department renovations, bulk medical gas upgrades, and new central utility plants; low, mid, and high rise multi-family and office buildings; heavy manufacturing plants and facilities; hospitality, new and renovation; primary education, single buildings and whole campus; college and university laboratory buildings; and design/build division of GE Medical Systems for MRI and CAT scan facilities. Rod has been with Syska Hennessy Group for 14 years, leading the San Diego office plumbing group including plumbing technical and standards development leadership role for the west coast division of Syska Hennessy. Rod has supported local ASPE chapters as President for the Wisconsin and San Diego Chapters; V.P. Legislative, V.P. Technical and currently Treasurer for San Diego Chapter. He has a B.S. in Architectural Engineering from the Milwaukee School of Engineering, and the ASPE CPD and GPD certifications.

Juan Contreras

Vice President, Legislative

Juan I. Contreras, CPD is a Senior Plumbing designer at Salas O’brien in San Diego. He has over 27 years of experience in the Plumbing industry, as he specializes in all aspect of Plumbing design, from concept to construction. Juan has been involved with ASPE at many levels, including former president of Southern Nevada Chapter, VP Tech of Orange County Chapter, and is currently and proudly serving as the VP Legislative for the San Diego Chapter. Juan is a strong believer in the power of positive thinking and team work. Juan also enjoys oil painting, good music and dancing, and can been found on a long winding road on his Harley every now and then.

Liza Cusimano

Administrative Secretary

Liza has more than a 10 years experience working in various engineering fields. She has always found fulfillment in technical design. This includes factory work and product design as well as designing building plumbing systems. She has spent the past 7 years as working as a plumbing designer for firms in Wisconsin and California.

Her Market Sector design experience includes Primary and Secondary Education, Post-Secondary, Stadiums, Biotech Laboratories, Health Care Facilities, new and renovation; Hospitality, low, mid, and high rise; Historic Building renovation, Industrial Facilities renovation, Multi-family housing, and Restaurants.

Liza works as a Senior Plumbing Designer for Turpin & Rattan Engineering where she leads the plumbing discipline on projects and helps to develop Revit standards for the department.

She has a B.S. in Architectural Engineering, emphasis in Plumbing, Fire Protection, and HVAC Design, from the Milwaukee School of Engineering and has obtained the ASPE CPD certification.

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Anthony Wikum

Vice President, Technical

Anthony grew up in rural South Kona Hawaii (Big Island).  Growing up outdoors, he enjoyed cultivating his creativity and ingenuity.  Anthony worked in many facets of the coffee processing industry, as well as homebuilding and commercial construction, including welding and fabrication.  His semi-feral upbringing contributed to conceiving and following through with well-rounded solutions.

Currently positioned on the Business Development group at Dawson Company, one of industry-leading Southern California manufacturers.  Anthony is a representative for Hydronic Fluid Handling, Plumbing, and Heat Transfer Equipment.  Dawson company is a representative of residential, commercial, and industrial plumbing and heating and cooling equipment.  Dawson Company has a distinguished reputation that has industry-wide recognition and acknowledgments as one of the top 20 companies in Los Angeles County.

Anthony has previous experience with McParlane & Associates from 2011 to 2019, and has over 16 years of experience in the construction industry.    He is knowledgeable about applicable plumbing codes, design practices, and construction standards for plumbing and mechanical systems.


Anthony is applying his past experiences and engineering expertise from McParlane & Associates to produce designs that make tenants comfortable in facilities such as high-rise/mixed-use residential towers; hotels; office structures for shell/tenant improvement and build-to-suit; multi-campus buildings; education; manufacturing; medical offices and hospitals; commercial/retail; and military. 


Anthony works continually to maintain current knowledge of water efficiencies for LEED applications; and ensures that his knowledge of plumbing and mechanical systems; local, state, national codes, and energy conservation codes (CMC, UPC, CPC, IPC, Cal Green) is also kept up-to-date.

Chrissy Hamm

Vice President, Membership

Chrissy Hamm has been involved in the plumbing industry for over 20 years. Chrissy began her career as plumbing manufactures representative in 1999 and has represented many of the strongest brands in the industry from the highly technical to the most basic. She has been working at Specification Sales for over 11 years and based on the product mix she has represented, she has become expert in the industry. She has been responsible for calling on multiple customer channels including; end-users, inspectors, engineers, architects, contractors and distributors. Chrissy supports ASPE as well as maintains involvement with several other plumbing organizations including PHCC, IAPMO, ICC & NAWIC. She is married and a mother to her daughter Madison. In her spare time, she enjoys running and hiking.

Martin Trim, PE, CPD, GPD, LEED® AP

ASPE San Diego Affiliate

Martin is a third-generation plumber who started working in industry at a very young age. As a professional mechanical engineer. he has Journeyman level plumbing and gasfitter certifications. He has served various engineering firms in design and project management roles and is currently the principal engineer at Barrett Engineered Pumps. Martin is responsible for technical support to both the civil and mechanical engineering communities. Martin has been an expert witness for plumbing, HVAC, and fire protection cases, and continues to selectively take on projects in that realm. Martin has been on the NFPA Technical Committee for Residential Fire Sprinklers on behalf of the American Society of Plumbing Engineers since 2012. Additionally, he has assisted in the code making process for the 2013, 2016, 2019, and 2022 versions of the NFPA 13R and 13D standards.

Martin joined the local ASPE Board of Directors in 2009 as VP Legislative and went on to serve as President for five years. For the San Diego chapter, he is currently the Affiliate Liaison, the Golf Tournament Chair, serves on the Board of Governors, and teaches the CPD class. Martin is on the Legislative Committee for ASPE National where he serves as the liaison with the NFPA Residential Sprinkler Technical Committee. 

Anthony Simpson

Corresponding Secretary

Anthony J. Simpson, is an Outside Sales Representative for Delco Sales in San Diego. With over 12 years of experience in the Plumbing industry, Anthony specializes in Design Build Contractors, specifying Engineers, Architects, and responsibilities in plumbing wholesale distribution. Anthony has been a part of ASPE for 5 years. He has a Bachelors degree from Bowling Green State University in Business and Sociology. Both of his grandfathers were Plumbers and grew up closely inspecting the technics and tools of the trade. He is a family man with two little boys that are and will continue to give him a run for the money.

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