Mackenzie draws strength from the diverse talents and specialties of our staff. Click on the photos to get to know the members of our integrated team. Looking for a particular person, capability, or job function? Use the filter options or search field below.

Principals and Associate Principals

Brent Ahrend
  • PE
Transportation Planning
Associate Principal, Assistant Department Head - Transportation Planning

Brent Ahrend combines technical skills in transportation analysis and modeling with strong communication and demonstrated abilities to provide...Learn More

Peter Alto
Architecture
Associate Principal, Architect

A graduate of the University of Oregon, Peter Alto has more than three decades of architectural experience. Peter manages the majority of...Learn More

Alexis Bauer
  • NCIDQ #029790
Interiors
Associate Principal, Assistant Department Head - Interiors

Alexis Bauer brings many years of experience leading interior design teams on projects large and small. Alexis has worked extensively on tenant...Learn More

Matt Butts
  • PE
  • LEED AP
Civil Engineering
Principal, Director of Civil Engineering & Transportation Planning

Matt Butts leads Mackenzie's Civil Engineering and Transportation Planning departments. Matt manages most of the firm’s infrastructure and...Learn More

Michael Chen
  • LEED Green Associate
Land Use Planning
Associate Principal, Land Use Planning

Michael Chen brings expertise in land-use planning, SEPA review, permit entitlement, feasibility studies, project management, and business...Learn More

Brett Conway
  • NCARB
  • LEED AP
Architecture
Associate Principal, Architect

Brett Conway, an award-winning architect, has more than 30 years of design experience in the Pacific Northwest. Brett has focused on industrial...Learn More

Rusty Gesner
Architecture
Associate Principal, Corporate Advisor - CAD/BIM

Recognized in 2007 by Autodesk as a “Legend of AutoCAD”, Rusty Gesner is one of the industry's foremost software experts. A licensed architect,...Learn More

Brett Hanson
  • AIA
  • GGP
  • LEED AP
  • NCARB
Architecture
Associate Principal, Architect

Brett Hanson has been involved in the design of complex projects across the Pacific Northwest, including fire and police essential facilities, and...Learn More

Mark Hettum
  • SE
  • PE
  • LEED AP
Structural Engineering
Principal, Structural Engineer

Mark Hettum joined Mackenzie in 1993. Mark manages the firm's operations and serves as the engineering principal on some of Mackenzie's most...Learn More

Alison Hoagland
  • AIA
  • LEED AP
Architecture
Associate Principal, Department Head - Architecture

Alison Hoagland is a key leader on Mackenzie's retail team. Alison has worked on a range of project types in her time at Mackenzie, including...Learn More

Jeff Humphreys
  • AIA
  • CSI
  • LEED AP BD+C
Architecture
Principal, Director of Architecture

Jeff Humphreys has focused his career on the assessment, design, and development of public projects, with a specialization in essential facilities...Learn More

Lynne Ingram
  • NCIDQ #10058
Interiors
Principal, Design Director, Director of Interior Design

Lynne Ingram is Mackenzie’s Design Director - Interiors. Lynne brings nearly 30 years of design and project management experience, and has a broad...Learn More

Todd Johnson
Land Use Planning
Associate Principal, Director of Land Use Planning

Todd Johnson has decades of planning experience in the Pacific Northwest. Todd, a member of NAIOP Oregon’s board of directors, is sought after for...Learn More

Terry Krause
  • AIA
  • NCARB
Architecture
Principal, Architect

Terry Krause leads Mackenzie’s retail team, bringing over 30 years of professional experience working with national retailers and developers....Learn More

Dave Larson
  • PE
Civil Engineering
Principal, Branch Manager - Vancouver, Civil Engineer

Dave Larson—both a licensed civil and traffic engineer—led the civil and traffic engineering departments at Mackenzie for more than 26 years....Learn More

Jan Mason
Marketing
Associate Principal, Director of Marketing

From assistant to the president to landscape designer, Jan Mason has served many roles in her career at Mackenzie. She became head of the firm's...Learn More

Barb McCullough
  • SPHR
Administration
Associate Principal, Director of HR & Administration

Barb McCullough enjoys working with people, which explains why she splits her time between managing the accounting department and being the main...Learn More

Josh McDowell
  • SE
  • PE
  • LEED AP
Structural Engineering
Principal, Director of Structural Engineering

Josh McDowell leads Mackenzie's structural engineering practice, and has over two decades of experience in the field. Josh oversees the structural...Learn More

Rich Mitchell
  • AIA
  • LEED AP BD+C
  • NCARB
  • GGP
Architecture
President, Architect

Rich Mitchell joined Mackenzie as a project architect in 1989. Rich takes a holistic approach to design, balancing client goals with stakeholder...Learn More

Wendell Mueller
  • AIA
  • LEED AP BD+C
Architecture
Associate Principal, Architect

Wendell Mueller has a diversity of experience, serving as project manager and project architect for retail, multifamily, commercial, high-tech,...Learn More

Tim Schweitzer
  • SE
Structural Engineering
Associate Principal, Department Head - Structural Engineering

During his long tenure at Mackenzie, Tim Schweitzer has provided design for a variety of structures including the design of tilt panels, concrete...Learn More

Adam Solomonson
  • AIA
  • LEED AP
Architecture
Associate Principal, Architect

Adam Solomonson has more than 14 years of architectural experience. His wide-ranging portfolio includes design for commercial, industrial,...Learn More

Morgan Toth
  • NCIDQ #29802
Interiors
Associate Principal, Department Head - Interiors

Morgan Toth brings exceptional abilities in communication, relationship building, and project management, and serves as the primary contact for...Learn More

Dietrich Wieland
  • LEED AP BD+C
Architecture
Principal, Director of Sustainability, Architect

Dietrich Wieland brings a breadth of diverse professional experience including mixed-use, urban redevelopment, commercial, retail, financial, and...Learn More

Dennis Woods
  • LEED AP
  • NCARB
Architecture
Principal, Architect

Dennis Woods joined Mackenzie in 1977 after graduating from the University of Oregon and working for a year for a small firm in Salem, Oregon,...Learn More