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.

Structural Engineering

Ryan Baker
  • PE
Structural Engineering
Senior Associate, Structural Engineering

Ryan Baker provides the structural design for a variety of project types, with an emphasis on industrial and federal facilities. He has served as...Learn More

Melinda Benko-Williams
  • EIT
  • ASCE
Structural Engineering
Structural Engineering

Melinda Benko-Williams received her Bachelor of Science in civil engineering from Portland State University. Melinda, an EIT, has worked as a...Learn More

Doug Fiala
  • SE
Structural Engineering
Senior Associate, Structural Engineer

Mackenzie's founder, Tom Mackenzie, hired Doug Fiala in 1972 at the recommendation of Portland State University's H. Chik Erzurumlu. Experience...Learn More

Joseph Fitzsimmons
  • EIT
Structural Engineering
Structural Engineering

Joe Fitzsimmons earned his Bachelor of Science degree in civil engineering from the University of Kansas. Joe is a member of Mackenzie’s...Learn More

Landon Harman
  • PE
Structural Engineering
Structural Engineering

Landon Harman works as a structural designer on commercial, retail, and industrial projects. Prior to joining the firm, he was a summer intern at...Learn More

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

A past director of structural engineering for the firm, Mark Hettum joined Mackenzie in 1993. Mark manages the firm's operations and serves as the...Learn More

Chris Jenkins
Structural Engineering
Structural Engineering

Chris Jenkins is originally from Orange, California, and works in Mackenzie’s Structural Engineering team. Prior to joining Mackenzie, Chris...Learn More

Christopher Jeseritz
  • EIT
Structural Engineering
Structural Engineering

Christopher Jeseritz is a certified Engineer-in-Training and holds LEED Green Associate credentials. He earned his MS in civil engineering, with...Learn More

Oliver Jim
  • EIT
Structural Engineering
Structural Engineering

Oliver Jim earned his Bachelor of Science degree in civil engineering from Oregon State University, with a minor in business and entrepreneurship...Learn More

Tyler Jones
Structural Engineering
Structural Engineering

Tyler Jones joined our structural engineering department and relocated from his home state of Michigan. Tyler graduated from Michigan State...Learn More

Nabil Kausal-Hayes
  • PE
  • GGP
Structural Engineering
Senior Associate, Structural Engineering

As a project engineer, Nabil Kausal-Hayes provides structural design and construction contract administration for projects large and small. His...Learn More

Thomas Kay
Structural Engineering
Structural Engineering

Thomas Kay earned his master’s in structural engineering, as well as his bachelor’s in civil and environmental engineering, from Portland State...Learn More

Tyler Kirchhofer
  • EIT
Structural Engineering
Structural Engineering

Tyler Kirchhofer, a member of our structural engineering team, received his Bachelor of Science in civil engineering from Oregon State University...Learn More

Deanna Kuhlman
  • EIT
Structural Engineering
Structural Engineering

Deanna received her MS and BS of Civil Engineering from Oregon State University with an emphasis in Structural Engineering. Her graduate research...Learn More

David Linton
  • PE
Structural Engineering
Associate, Structural Engineering

David Linton is a project engineer in Mackenzie's structural group. He has worked on a range of high tech, retail, and industrial projects at the...Learn More

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

Josh McDowell leads Mackenzie's Structural Engineering Department, and has nearly two decades of experience in the field. He oversees the...Learn More

Allen Rishel
  • EIT
Structural Engineering
Structural Engineering

Allen Rishel is a member Mackenzie’s Seattle Structural Engineering team and is originally from Holbrook, Arizona. His most notable past projects...Learn More

Andrew Robinson
Structural Engineering
Structural Engineering

Andrew Robinson, a structural designer, joined our Portland structural department after working two years in Christchurch, New Zealand. He has...Learn More

Tim Schweitzer
  • SE
Structural Engineering
Senior Associate, Structural Engineer

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

Sohaila Starks
  • EIT
Structural Engineering
Structural Engineering

Sohaila started her career at Mackenzie working as an intern in the structural department during the summer of 2013. After returning to Oregon...Learn More

Sarah Van Otterloo
Structural Engineering
Structural Engineering

Sarah Van Otterloo received her master’s degree in civil engineering from Oregon State University, and her bachelor’s in architecture from the...Learn More

Samra Wali
  • EIT
Structural Engineering
Structural Engineering

Samra Wali has a Bachelor of Science degree in architectural engineering from California Polytechnic State University. A member of Mackenzie’s...Learn More

Allen Weed
Structural Engineering
Structural Engineering

Allen Weed is a structural drafter with more than 16 years of experience as a drafter and technical illustrator/writer. He has provided on-site...Learn More