Rosanne Lynch

Rosanne was born in California and raised in Portland, OR. She earned her B.A. in 2003 in Urban Studies from Macalester College in St. Paul, Minnesota and her Masters of Architecture in 2009 from the University of Oregon Portland Urban Architecture program. Rosanne has worked with ABHT since 2008.
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Justin Lyons

Justin was born and raised in Vancouver, Washington. He obtained his B.S. in Civil Engineering from Washington State University (2007). Prior to joining ABHT in 2011, Justin worked for a large structural engineering firm in Tacoma.
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Andrea LB Roepke

Born and raised in Minnesota, Andrea earned her B.S. in Architecture from the University of Minnesota in 2003 and her Masters of Architecture from the University of Oregon Portland Urban Architecture program in 2005. Andrea joined ABHT in 2005.
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Natalia Quiroga


Natalia was born in Lima, Peru, and was raised in Arvada, Colorado. She holds a B.A. in Anthropology from the University of Colorado (2008). Natalia worked in event planning prior to joining ABHT in 2012. Natalia is fluent in Spanish.
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John Allender

John started with ABHT at the end of 2002 and was ABHT’s first full time employee. John obtained his B.A in Urban Planning from the University of Hawaii. John has worked for various companies and has also owned his own landscaping company prior to joining ABHT.
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Andy Anderson

A native Oregonian, Andy was born and raised in Eugene. He earned a B.S. in Civil Engineering from Portland State University (2007). Andy worked for a mid-sized Portland based structural engineering firm prior to joining ABHT in 2011.
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Paul Auerbach

Paul was born in Washington, DC and grew up in Arlington, VA. He holds a B.S. in Civil Engineering from the University of Virginia (1995) and a Masters of Civil Engineering from the University of Illinois at Urbana-Champaign (1997). Paul gained experience working for various structural engineering companies throughout many regions of the United States prior to joining ABHT in 2005.
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Sean Clark

Born in Florida and raised in Idaho, Sean earned his B.S. in Civil Engineering from Oregon State University in 2007 and his Associates Degree in Architectural Drafting from Lane Community College in 2003. Sean joined ABHT in 2007. Prior to obtaining his engineering degree, Sean held positions with various companies including Sony and Monaco Coach in Eugene.
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Clinton Ambrose

Clinton is one of the founding principals of ABHT. Born and raised on the island of Maui in Hawaii, Clinton earned his B.S. (1992) and M.S. (1994) in Civil Engineering from the University of Hawaii at Manoa. Clinton worked for various structural engineering companies in Honolulu, prior to relocating to Portland in 1997. Clinton worked as an associate/structural project manager at a large structural engineering firm in Portland, prior to becoming one of the founding principals of ABHT in 2002.
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Randall Toma

Randall is one of the founding principals of ABHT. Born and raised on the island of Oahu in Hawaii, Randall earned his B.S. in Civil Engineering (1995) and his Masters in Structural Engineering (1996) from Washington University in St. Louis, MO. Randall moved to Portland in 1996 and worked as an associate/structural project manager at a large structural engineering firm in Portland, prior to becoming one of the founding principals of ABHT in 2002. Randall has also taught structures courses periodically at the University of Oregon Portland Urban Architecture program as an adjunct since 2002.
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