Staff

John Katahira has 24 years of civil, sanitary, and environmental engineering experience and is a licensed civil engineer registered in the State of Hawaii. He earned a BS and MS in Civil Engineering and a MBA in Business Administration from the University of Hawaii at Manoa. He is responsible for the company’s planning services, which includes master planning, engineering feasibility studies, alternatives analysis reports, and environmental documents. He has received several honors for his individual achievements and contributions to the engineering community. In 2002, he received Pacific Business News’ Forty Under 40 Award; and in 2005, he was named Young Engineer of the Year by the Hawaii Society of Professional Engineers. He received one of 2009’s Three Outstanding Young Persons Award by the Rising Phoenix Jaycees; and in 2017, he was presented with the Outstanding Service Award by the University of Hawaii, College of Engineering. He served on the Board of Directors for the American Council of Engineering Companies of Hawaii from 2003-2013 and the Hawaii Water Environment Association from 2005-2009.

Jason Lau has 27 years of experience on civil and sanitary engineering projects spanning Federal, State, City, and private sector projects in Hawaii and California. He earned a BS in Civil Engineering from Santa Clara University and is a licensed civil engineer registered in the State of Hawaii. In 2008, he became LEED Accredited for New Construction by the Green Building Certification Institute. His projects involve various civil engineering disciplines with emphasis on site development, utilities, erosion control, and roadway infrastructure. His experience and technical skills include coordination, design, feasibility studies, preliminary engineering reports, and preparation of specifications and cost estimates. He served on the Board of Directors for the American Public Works Association from 2009-2014.

Ian Arakaki has 23 years of experience on civil, sanitary, and environmental projects. He earned a BS in Civil Engineering from Purdue University and is a licensed civil engineer registered in the State of Hawaii. In 2013, he became a Certified Construction Manager accredited by the Construction Management Association of America. His duties include master planning, engineering feasibility studies, alternatives analysis reports, and supervisory responsibilities for all construction management and observation projects. He served on the Board of Directors for the American Society of Civil Engineers from 2009-2015.

Yvonne Turro has 24 years of experience in the civil engineering field with an emphasis on land development and Low-Impact Development (LID) improvements. She earned a BS in Civil Engineering from the U.S. Coast Guard Academy and is a licensed civil engineer registered in the State of Hawaii. Her projects include engineering feasibility studies, BMP design for stormwater pollution prevention, and residential and commercial site development.

Eric Arakawa has 17 years of civil engineering design and construction experience. He earned a BS in Civil Engineering and a MBA in Business Administration from the University of Portland and is a licensed civil engineer registered in the State of Hawaii. His design experience includes roadway infrastructure, utilities design, and site development. He also serves as Construction Manager/Inspector for roadway and utility improvement projects (sewer, water, electrical). In 2016, he was named Young Engineer of the Year by the Hawaii Council of Engineering Societies. He served on the Board of Directors for the American Society of Civil Engineers since 2015 and is currently the organization’s President.

Joe Kwan has 12 years of civil and sanitary engineering experience. He earned a BS in Civil Engineering from the University of Hawaii at Manoa and is a licensed civil engineer registered in the State of Hawaii. In 2009, he became LEED Accredited for New Construction by the Green Building Certification Institute. His projects include the planning, design, and construction of wastewater collection systems, pump stations, force mains, and treatment facilities. He is also experienced with site development and utility design.

Trevor Vagay has 11 years of experience on civil and sanitary engineering projects. He earned a BS in Civil Engineering from the University of Hawaii at Manoa and is a licensed civil engineer registered in the State of Hawaii. His projects include stormwater erosion control design, wastewater collection systems, wastewater force mains, wastewater treatment facilities, and roadway improvements.

Lori Higashi has 9 years of experience on civil engineering and construction management projects. She earned a BS in Civil Engineering from the University of Hawaii at Manoa and is a licensed civil engineer registered in the State of Hawaii. Her projects include wastewater collections systems, force mains and pump stations, utility design, and construction management of wastewater infrastructure and vertical structures.

Jessica Agsalda has 8 years of experience in civil engineering. She earned a BS in Civil Engineering and MS in Environmental Engineering from the University of Hawaii at Manoa and is a licensed civil engineer registered in the State of Hawaii. Her projects include subdivisions, potable water wells, reservoirs, wastewater infrastructure, utility design, and street rehabilitation.

Kapiolani Street has 5 years of experience on civil and sanitary engineering projects. She earned a BS in Civil Engineering and a BA in Anthropology from the University of Hawaii at Manoa. Her projects include stormwater erosion control design, wastewater system design, site development, and utility design. She is currently serving as Secretary for the Amercan Water Works Association and American Society of Civil Engineers Young Member Forum.

Sean Cagadas has 5 years of experience on civil and sanitary engineering projects. He earned a BS in Civil and Environmental Engineering from the University of Hawaii at Manoa and received his Engineer-In-Training certification. His duties include assistance on wastewater system design and construction management projects. His projects include collection system rehabilitation and roadway improvements.

Angela Kent has 3 years of experience on civil and sanitary engineering projects. She earned a BS in Civil Engineering with a Minor in Business Administration from the University of Hawaii at Manoa and received her Engineer-In-Training certification. Her projects include stormwater erosion control design, wastewater system design, utility design, and roadway improvements.

Korey Tsubota has 3 years of experience on civil and sanitary engineering projects. He earned a BS in Environmental Engineering from San Diego State University and a MS in Environmental Engineering from the University of Hawaii at Manoa. He received his Engineer-In-Training certification and will assist on civil and sanitary engineering and construction management projects.

Paul Shupak has 3 years of experience on construction projects involving wastewater infrastructure and utility improvements. He earned a BS in Civil Engineering from the New Jersey Institute of Technology and received his Engineer-In-Training certification. He will assist on civil and sanitary engineering and construction management projects.

Kip Asato has 3 years of experience on civil engineering projects. He earned a BS in Civil Engineering from Oregon State University. He received his Engineer-In-Training and Land Surveyor-In-Training certifications. He will assist on civil and sanitary engineering projects.

Sara Lin earned a BS in Biological Engineering from the University of Hawaii at Manoa and a BS in Chemistry from Seattle University. She received her Engineer-In-Training certification. Her duties include management of wastewater projects, consultants, schedule, and cost; technical review of consultant and contractor submittals; and coordination with wastewater system and treatment operators.

Tuan Giang earned a BS in Computer Science with a Minor in Mathematics from the University of Hawaii at Hilo. His duties include programming SCADA systems and PLC for the City and County of Honolulu.

Henry Higashi has over 21 years of AutoCAD experience designing concrete forming and shoring systems. He earned an AS in Math/Science from Ventura Junior College.

Claire Oshiro has 21 years of experience as a planner on infrastructure projects for federal, state, and local agencies, as well as private entities. She received a BA in General Arts and Architecture from Pennsylvania State University. Her duties include research, editing, preparation and submittal of environmental assessments and environmental impact statements.

Jason Nakata has 11 years of experience in environmental and land use compliance planning in support of civil infrastructure and development projects. He earned a BS in Civil Engineering and a MBA in Business Administration from the University of Hawaii at Manoa and is a licensed civil engineer registered in the State of Hawaii. His duties include preparation of Environmental Assessments; planning reports; NPDES, Special Management Area, Zoning and other discretionary permits; and consultation with Federal, State and County regulating agencies.

Audrey Haerle earned a BS in Environmental Studies from Hawaii Pacific University. She has 10 years of experience in stormwater sampling, analysis, and reporting to meet MS4 NPDES permit requirements and creating geodatabase and managing GIS shapefiles. She served on the Board of Directors for the Hawaii Water Environment Association since 2015 and is currently the organization’s Past President. She has also served as the Public Education Committee Co-Chair since 2012.

Paul Serikawa has 10 years of construction inspection experience on stormwater pollution prevention projects, including construction oversight and administration services for the Department of Transportation’s Stormwater Management Plan. He is a graduate of Punahou School.

Mike Perry has 3 years of experience providing construction oversight and administration services for the State Department of Transportation’s Stormwater Management Plan. He is a graduate of Saint Louis School.

Scott Lai has 4 years of experience serving as Project Manager on asphalt concrete paving projects. His projects include removal and installation of new asphalt pavement and restriping of parking lots and roadways. He received a BA in Sociology from the University of Hawaii at Manoa.

Diane Lau has 11 years of experience as an administrative assistant. She earned an AS in Culinary Arts from Kapiolani Community College. Her responsibilities include clerical duties and project assistance.

Rhiannon Adina has 6 years of experience as an administrative assistant. She earned a BS in Business Management from the University of Phoenix. Her responsibilities include clerical duties and project assistance.

Dana Lei has 6 years of experience as an administrative assistant. She earned an AS in Pastry Arts from Kapiolani Community College. Her responsibilities include clerical duties and project assistance.