541-585-2207 info@carowles.com

Key Personnel – Team

Charles A. Rowles, PE, Principal

With more than thirty years in civil engineering and building design, Charlie carries an enviable record of experience. Garnering the confidence of clients and localities, his charisma and work ethic became the foundation of our firm in 2004. Since then, Charlie has overseen more than six hundred projects at C A Rowles Engineering & Design. He holds multiple professional registrations and affiliations, in addition to a Bachelor’s of Science in Civil Engineering from Oregon State University. When he isn’t in the office, he’s volunteering with the Oregon School Ski Association, or at his church, Christian Life Center.

Matt Williams, Civil Design

Matt joined our firm from Washington D.C., where he practiced land use planning, civil engineering design and local government consulting. Here he applies that experience from concept through construction, meeting client objectives and navigating today’s regulatory environment. Matt has a Bachelor’s of Science in Design from East Carolina University.

Ryan Byrne, Building Designer

Ryan joined our firm with design experiences with small design-­‐build construction teams in Washington and Oregon.  As a building designer, he has a variety of experience, with a focus on preparing construction drawings, code review, space planning, and creating 3D rendering.  Involved on over 150 projects in varying phases, his design work has encompassed buildings from New York to Australia, to Mongolia.  Ryan has a Bachelor’s of Science in Architectural Studies from Washington State University.


Treasha Linton, CAD Specialist

Treasha joined our firm as a performance-driven and detail-oriented drafting professional with relevant experience in architectural, mechanical, electrical, plumbing, and civil fields. As a CAD Specialist, she has been involved in preparing plans and details for wood construction, multi-story steel, and concrete construction. Treasha has a certificate in Computer Aided Drafting and Design from Central Oregon Community College.


May Tsai, Architect

May joined our firm with more than thirty years of experience in architecture while in Boston, Minneapolis, the San Francisco Bay Area, Portland and Central Oregon. As a licensed architect in California and Oregon, she has worked for large, medium, and small sized firms, and had her own practice for over 18 years designing a variety of both commercial and residential projects. Her focus in architecture is to help clients discover what they want and need in their projects and make it come to life. May holds a Masters in Architecture from the Massachusetts Institute of Technology. Outside of architecture and design, May and her husband, Mike, are avid golfers and she has a passion for baking desserts.


Jennifer Freed, Office Manager

Jennifer came to our firm with administrative experience in a variety of industries including tech, health care, and law. Her well-honed organizational and communication skills keep the office humming. In her free time, she can be found doing crossword puzzles and hiking with her husband and three children.