RMTC is led by a senior management staff with an average of 35 years of professional experience. These discipline leaders have extensive technical backgrounds, as well as many years of experience in project management and contract administration. They serve as industry experts and mentors to staff internally as well as external to the firm in various professional and community organizations. With their many years of service in Hawaii and the Pacific, they are often able to assist clients and projects by fostering productive agency consultation and agreements by leveraging their understanding of government priorities, protocol, and requirements. They are well-respected members of Hawaii’s engineering community and highly knowledgeable about the unique issues affecting our island state.

Name Title Department
Greg Hiyakumoto, PE, LEED AP President Administration
Leighton Lum, Ph.D., PE Senior Vice President / Department Manager Water & Wastewater Engineering
Collins Lam, PE Vice President / Department Manager Civil Engineering
David Tanoue, Esq. Vice President / Department Manager Planning & Permitting
Surveying & Mapping
Roy Tsutsui, PE Vice President / Department Manager Construction Management
James Yamamoto, PE Vice President / Senior Project Manager Civil Engineering
Craig Luke, PE Vice President / Senior Project Manager Civil Engineering
Robert Spencer Secretary / Treasurer / Comptroller