MAYFLY TEAM

Our team is filled with both energy and experience. We are ready to help you with your project!

ROBIN MCKENNON THALER, PE, LEED AP
Principal Engineer

Robin specializes in the design and planning of projects that are sensitive to both their social and natural environments.  Robin is a LEED accredited professional engineer with a comprehensive and varied experience in civil engineering design and development.  Her unique natural resource background brings a focus on meaningful solutions through integrated design to all the to the projects she contributes to.  

 Robin’s portfolio of built projects includes city parks, commercial development, green streets, infiltrating pathways, an urban stormwater conveyance “creek”, underground injection wells (UICs) and rainwater reuse facilities.  Robin provides design services ranging from project planning and options analysis through construction administration and design review.  From specifications and design documentation to construction documents and administration- Robin is well versed in pulling projects together and getting them built.

 Robin has 25 years of engineering experience.  She founded Mayfly Engineering + Design, PLLC in 2006 to focus on sustainable design.

ELAINE GUO, LEED AP
Design Engineer

Elaine is passionate about sustainability and is a LEED accredited professional. She has her master’s in environmental engineering from the University of Washington. She interned with Mayfly during her final year at the University and started full time with Mayfly after graduation. She provides support to our projects by providing project production support, drafting support, and stormwater calculations. She is interested in continuing to learn about stormwater engineering and design.

BETHANY STEADMAN, PE
Project Manager

Bethany is a civil engineer and project manager with experience in K-12 projects. Her work includes all stages, including master planning, preliminary and feasibility studies, value engineering, permitting and construction documents, and construction services. Through her experience on complex sites requiring stormwater management, she has become passionate about stormwater management to provide solutions that are both environmentally friendly and meets the client’s short- and long-term needs. She recognizes that Accessibility Design Guidelines have been established to help serve all members of the community and strives to be a leader in accessible site design.

Bethany has completed dozens of projects on occupied sites which used phased approaches to construction to keep the existing facilities in operation. This work often included the construction of temporary classroom facilities and early demo/site packages. Bethany is familiar with K-12 projects with complicated phasing and working within occupied sites. As an integrated team member, she has contributed her expertise to early cost reconciliation meetings, value engineering, and evaluated the life cycle cost of civil elements like stormwater management facilities and site surfacing materials.

ELLIE ELEFSON, EIT
Design Engineer

Ellie is an environmental engineer with experience in water quality and treatment as well as stormwater design. After graduating from the University of Washington she decided to start her career by joining the innovative team at Mayfly. Ellie is passionate about stormwater design and appreciates the benefits good design can have on both building functionality and the environment. She is also interested in learning how to design spaces that are accessible to everyone. At Mayfly she hopes to expand her knowledge by working with engineers who are highly experienced in both sustainable and accessible design.

Ellie was born and raised in western Washington, so she has spent a lot of time exploring the outdoors. She strives to preserve the natural beauty around her and looks for every opportunity to do so in her community. She also gives back to her community by volunteering with the ACE Mentor Program. Through this she hopes to educate students on how they can make a difference through environmental or civil engineering.