Austin harper - P.E. - PRINCIPAL ENGINEER
Our Senior Principal Engineer, Austin Harper joined the firm in 2018 after an internship with the Chelan County Public Works Department.
Austin graduated from Washington State University in 2016 with a B.S. in Civil Engineering, and passed his rigorous exams to receive his Professional Engineer license in the State of Washington while working for Munson Engineers.
Austin is an expert in residential and commercial pool design, being the engineer of record for over fifty residential and commercial pools in 2024 alone. Austin also has substantial experience and expertise with retaining wall engineering and design, and is Engineer of record for the Steven's Pass Ski Resort Kehr's Chair retaining wall as well as over 80 other private and commercial retaining wall designs in the North Central Washington area.
Austin is involved in engineering tasks with many public entities and projects, including the Manson Fire District facilities expansion and the Awaken Church parking lot design. Austin is Engineer of Record for several substantial condominium, warehouse, and townhome projects, and is currently working on design and engineering for several large Plats in North Central Washington, one being over 200 lots in size in Moses Lake.
Austin is adept at taking projects from an idea or outline clear through planning, permitting, design, and computations, to finalizing a complete and precise project for our clientele.
Contact: [email protected]
Austin graduated from Washington State University in 2016 with a B.S. in Civil Engineering, and passed his rigorous exams to receive his Professional Engineer license in the State of Washington while working for Munson Engineers.
Austin is an expert in residential and commercial pool design, being the engineer of record for over fifty residential and commercial pools in 2024 alone. Austin also has substantial experience and expertise with retaining wall engineering and design, and is Engineer of record for the Steven's Pass Ski Resort Kehr's Chair retaining wall as well as over 80 other private and commercial retaining wall designs in the North Central Washington area.
Austin is involved in engineering tasks with many public entities and projects, including the Manson Fire District facilities expansion and the Awaken Church parking lot design. Austin is Engineer of Record for several substantial condominium, warehouse, and townhome projects, and is currently working on design and engineering for several large Plats in North Central Washington, one being over 200 lots in size in Moses Lake.
Austin is adept at taking projects from an idea or outline clear through planning, permitting, design, and computations, to finalizing a complete and precise project for our clientele.
Contact: [email protected]
TREVOR wire - principal PLS and FAA CERTIFIED DRONE PILOT
Trevor joined Munson Engineers in 2023, and since that time he has obtained his Professional Land Surveyor's licensure and is now our Principal PLS. Trevor has over a decade of experience surveying, and brings a variety of valuable knowledge to the firm, including plat, boundary, and construction calculations and staking.
Trevor started his career in his home state of Pennsylvania, where he worked on a survey crew for an engineering company, rising through the ranks to become crew chief. In 2016, Trevor decided to migrate West to explore the many outdoor recreational opportunities this area has to offer.
Since that time, Trevor has been working within all aspects of the surveying field in the Wenatchee and Leavenworth areas. He has obtained an FAA Certified Drone Pilot Certificate and has recently achieved receiving his Professional Land Surveyor license with the State of Washington.
Trevor has been involved lately with many publicly recognized projects, including Steven's Pass Ski Resort Kehr's Chair run (alignment, staking, and retaining wall), and the Cascade Orchards Irrigation District expansion (FEMA Flood certification, benchmarks, and controls, plus DNR mapping), and several City projects.
When Trevor isn't in the office doing calculations or out in the field surveying for clients, he spends his time creating
and playing music, camping, pursuing outdoor sports, gardening, and spending time with his family.
Contact: [email protected]
Trevor started his career in his home state of Pennsylvania, where he worked on a survey crew for an engineering company, rising through the ranks to become crew chief. In 2016, Trevor decided to migrate West to explore the many outdoor recreational opportunities this area has to offer.
Since that time, Trevor has been working within all aspects of the surveying field in the Wenatchee and Leavenworth areas. He has obtained an FAA Certified Drone Pilot Certificate and has recently achieved receiving his Professional Land Surveyor license with the State of Washington.
Trevor has been involved lately with many publicly recognized projects, including Steven's Pass Ski Resort Kehr's Chair run (alignment, staking, and retaining wall), and the Cascade Orchards Irrigation District expansion (FEMA Flood certification, benchmarks, and controls, plus DNR mapping), and several City projects.
When Trevor isn't in the office doing calculations or out in the field surveying for clients, he spends his time creating
and playing music, camping, pursuing outdoor sports, gardening, and spending time with his family.
Contact: [email protected]
tERRI TIMPE - CFO, CES - MANAGING PRINCIPAL
As Managing Principal of the firm, Terri Timpe has been involved with our administrative and technical support for land surveying and engineering for 42 years, and lends her expertise in client contact, accounting, and contract administration to our firm. In addition, she has been using AutoCAD products to provide accurate mapping services for Munson Engineers since the program was introduced in 1993 and is skilled in producing precise plat, boundary, ALTA, and topographical drawings.
Miss Timpe holds a Bachelor of Arts degree from Washington State University and various other professional certifications, including a Notary Public license, Microsoft Cybersecurity, Microsoft Generative AI, and Online Accessibility Training.
In addition to her duties at our firm, Terri served as a consultant for eleven years for WSU Global Campus regarding online technical and navigational issues. Terri serves on the Advocacy Committee for the Wenatchee Valley Chamber of Commerce and is currently the Treasurer, Grant Facilitator, and Board member for Two Rivers Gallery 501(c)3 non-profit in Wenatchee.
In her spare time, Terri loves to paint in all mediums and has artwork on display in various facilities around Wenatchee, and is a member of the Wenatchee Watercolor Society. She is an accomplished writer who has one published novel to her name and one in the works. Terri is also a proficient gardener and loves to cook gourmet meals for her family and friends using herbs and produce she has cultivated.
Contact: [email protected]
Miss Timpe holds a Bachelor of Arts degree from Washington State University and various other professional certifications, including a Notary Public license, Microsoft Cybersecurity, Microsoft Generative AI, and Online Accessibility Training.
In addition to her duties at our firm, Terri served as a consultant for eleven years for WSU Global Campus regarding online technical and navigational issues. Terri serves on the Advocacy Committee for the Wenatchee Valley Chamber of Commerce and is currently the Treasurer, Grant Facilitator, and Board member for Two Rivers Gallery 501(c)3 non-profit in Wenatchee.
In her spare time, Terri loves to paint in all mediums and has artwork on display in various facilities around Wenatchee, and is a member of the Wenatchee Watercolor Society. She is an accomplished writer who has one published novel to her name and one in the works. Terri is also a proficient gardener and loves to cook gourmet meals for her family and friends using herbs and produce she has cultivated.
Contact: [email protected]
mark siegenthaler - P.L.S., P.E.
Mark Siegenthaler is a Professional Engineer and Professional Land Surveyor who brings over 40 years of experience to our firm. Mark provides civil design and land surveying services for private and public projects, from site feasibility analysis and master planning through permitting, design and construction.
His surveying projects have included residential and commercial boundary retracement and topographic surveys, boundary line adjustments, short plats and plats, floodplain surveys, sensitive areas delineation, bathymetric surveys, GPS control network surveys, as-builts and construction staking. He writes legal descriptions, including view easements, access and utility easements, and boundaries. He has experience with creating mapping using LiDAR and geographic information systems (GIS). He is a licensed unmanned aircraft system (UAS) pilot. Mark combines his knowledge of surveying with his expertise in land development to prepare mapping that facilitates permitting and identifies potential engineering and land development issues.
Mark provides land development services including site planning and feasibility analysis, site layout, plat design, road design, storm drainage, sewer and water design, onsite sewage disposal for individual and community systems, site grading, and erosion control design. His projects have included residential properties, office buildings, shopping centers, Washington State University at Tri-Cities, and many U.S. Coast Guard and U.S. Navy bases. He has conducted site master planning for the U.S. Coast Guard and Washington State University, and value engineering for Metro King County.
Mark is experienced in hydraulic modeling, including creation of a WaterGems model of the water supply and distribution system for Base Kodiak, Alaska for the U.S. Coast Guard. He led a team that designed, built, and ran a hydraulic research facility at Washington State University that tested the capability of high-pressure jets to scour nuclear waste sediment.
Mark has performed hydrologic modeling and statistical analyses of natural watersheds, together with the impacts of urbanization. These analyses have been applied to preliminary project planning and project permitting. He led award-winning projects of student teams including preliminary designs of fish passage projects, bridges, and Americans With Disabilities Act trailhead facilities. He has conducted HEC-RAS floodplain studies for flood insurance and project impact analyses, scour analyses and prepared hydraulic permits for bridge sites. Mark has conducted fluvial geomorphologic analyses of river meandering, and stream erosion and sedimentation.
Mark has B.S. Civil Engineering and B.S. Geology degrees from the University of Washington, and an M.S. Civil Engineering degree from Colorado State University. As a Ph.D. candidate at Washington State University, Mark conducted research in the performance of acoustic Doppler velocimeters in different fluids, together with scour from radial wall jets. Mark has been an Instructor at Seattle University and Washington State University, teaching undergraduate courses in surveying and geomatics, AutoCAD and Civil3D, hydrology, fluid mechanics, hydraulics, fluid mechanics and hydraulics laboratories, transportation engineering, engineering economics, and year-long senior design projects.
Contact: [email protected]
His surveying projects have included residential and commercial boundary retracement and topographic surveys, boundary line adjustments, short plats and plats, floodplain surveys, sensitive areas delineation, bathymetric surveys, GPS control network surveys, as-builts and construction staking. He writes legal descriptions, including view easements, access and utility easements, and boundaries. He has experience with creating mapping using LiDAR and geographic information systems (GIS). He is a licensed unmanned aircraft system (UAS) pilot. Mark combines his knowledge of surveying with his expertise in land development to prepare mapping that facilitates permitting and identifies potential engineering and land development issues.
Mark provides land development services including site planning and feasibility analysis, site layout, plat design, road design, storm drainage, sewer and water design, onsite sewage disposal for individual and community systems, site grading, and erosion control design. His projects have included residential properties, office buildings, shopping centers, Washington State University at Tri-Cities, and many U.S. Coast Guard and U.S. Navy bases. He has conducted site master planning for the U.S. Coast Guard and Washington State University, and value engineering for Metro King County.
Mark is experienced in hydraulic modeling, including creation of a WaterGems model of the water supply and distribution system for Base Kodiak, Alaska for the U.S. Coast Guard. He led a team that designed, built, and ran a hydraulic research facility at Washington State University that tested the capability of high-pressure jets to scour nuclear waste sediment.
Mark has performed hydrologic modeling and statistical analyses of natural watersheds, together with the impacts of urbanization. These analyses have been applied to preliminary project planning and project permitting. He led award-winning projects of student teams including preliminary designs of fish passage projects, bridges, and Americans With Disabilities Act trailhead facilities. He has conducted HEC-RAS floodplain studies for flood insurance and project impact analyses, scour analyses and prepared hydraulic permits for bridge sites. Mark has conducted fluvial geomorphologic analyses of river meandering, and stream erosion and sedimentation.
Mark has B.S. Civil Engineering and B.S. Geology degrees from the University of Washington, and an M.S. Civil Engineering degree from Colorado State University. As a Ph.D. candidate at Washington State University, Mark conducted research in the performance of acoustic Doppler velocimeters in different fluids, together with scour from radial wall jets. Mark has been an Instructor at Seattle University and Washington State University, teaching undergraduate courses in surveying and geomatics, AutoCAD and Civil3D, hydrology, fluid mechanics, hydraulics, fluid mechanics and hydraulics laboratories, transportation engineering, engineering economics, and year-long senior design projects.
Contact: [email protected]
robert culp, p.e. - FIRM ASSOCIATE
Bob Culp came to Munson Engineers from the Everett area as an experienced civil engineer specializing in street and utility design, and construction engineering. He is a licensed Professional Engineer and has been responsible for thousands of projects throughout Washington and Idaho throughout his 41 year tenure with the firm. Mr. Culp entered employment with Munson Engineers as Chief Engineer and is now retired, although he continues to lend his expertise to ongoing projects as an associate of the firm.
owen wickenheiser - surveying and field technician
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Owen has recently joined our firm this Spring of 2025 as a surveying and field technician. Own has plans to pursue a Professional Surveying License through Washington State.
Owen graduated from Bloomsburg University of Pennsylvania with a B.S. in Environmental Geoscience and a minor in GIS and Spatial Analysis. Before joining Munson Engineers, Owen worked as a Climbing and Wilderness Ranger for the USFS. There he helped with Wilderness campsite inventory mapping, and coordinated multiple trail restoration projects with local and national climbing advocacy groups. In the wintertime, Owen works as a full time Ski Patroller and maintains a Wilderness EMT certification. Contact: [email protected] |
JENNIFER FARIAS - ENGINEERING, surveyING, and FIELD TECHnician
Jennifer Farias joined the firm as a summer intern in 2024 and we hope to have her on a full-time basis once she attains her degree!
Jennifer is working on her third year pursuing a B.S. in Civil Engineering at Seattle University. She also serves on the College of Science and Engineering Student Advisory Council at Seattle University. Jennifer graduated from Bridgeport High School in 2022, and along with receiving her diploma at Bridgeport High School she accomplished receiving her A.A in Arts & Science from Wenatchee Valley College through the running start program.
Jennifer really loves the outdoors, enjoying the lake, and likes canvas painting, along with spending time with her family.
Contact: [email protected]
Jennifer is working on her third year pursuing a B.S. in Civil Engineering at Seattle University. She also serves on the College of Science and Engineering Student Advisory Council at Seattle University. Jennifer graduated from Bridgeport High School in 2022, and along with receiving her diploma at Bridgeport High School she accomplished receiving her A.A in Arts & Science from Wenatchee Valley College through the running start program.
Jennifer really loves the outdoors, enjoying the lake, and likes canvas painting, along with spending time with her family.
Contact: [email protected]