Infrastructure
With today's limited funding to repair and replace our infrastructure backbone, the Mackenzie team continues to design our community's roads, parks, and utilities with a focus on the future and added value. Matt Butts leads Mackenzie's work in this market sector.
Brent AhrendTransportation Planning
Associate Principal, Assistant Department Head - Transportation Planning
bahrend@mcknze.comBrent Ahrend combines technical skills in transportation analysis and modeling with strong communication and demonstrated abilities to provide...Learn More
Matt ButtsCivil Engineering
Principal, Director of Civil Engineering & Transportation Planning
mbutts@mcknze.comMatt Butts leads Mackenzie's Civil Engineering and Transportation Planning departments. Matt manages most of the firm’s infrastructure and...Learn More
Gabriela FraskLand Use Planning
Senior Associate, Department Head - Land Use Planning
gfrask@mcknze.comGabriela joined Mackenzie with experience working as a policy coordinator, as well as in corridor transportation planning. Clients benefit from...Learn More
Bob FrentressCivil Engineering
Senior Associate, Civil Engineer
bfrentress@mcknze.comBob Frentress joined Mackenzie in 1993 after earning a B.S. in civil engineering from Portland State University. He provides street design, storm...Learn More
Ralph HendersonCivil Engineering
Senior Associate, Civil Engineer
rhenderson@mcknze.comRalph Henderson is noted for his technical mastery. He has worked on a variety of projects from roadway improvements to athletic fields and parks...Learn More
Brian HollenbachCivil Engineering
Senior Associate, Civil Engineer
bhollenbach@mcknze.comBrian Hollenbach brings a background of 16 years of experience on commercial, residential, and general civil engineering projects, including...Learn More
Brent NielsenCivil Engineering
Senior Associate, Assistant Department Head - Civil Engineering
bnielsen@mcknze.comBrent Nielsen earned his B.S. and M.S., with an emphasis on geotechnical engineering, from Montana State University. Brent joined Mackenzie in...Learn More
Steven TuttleLandscape Architecture
Senior Associate, Department Head - Landscape Architect
stuttle@mcknze.comSteven Tuttle has more than a decade of professional landscape architecture experience throughout the Pacific Northwest. Steven has been involved...Learn More