Delivering a Quality Design, On Time, Every Time
At Mayfly Engineering + Design, LLC, we specialize in providing civil engineering and design consulting services that prioritize the social and natural environments. Our team is dedicated to creating sustainable landscapes through low-impact design. We strive to make a positive impact on the communities we serve, from residential to neighborhood planning projects.
Our Services
Our expertise lies in a range of areas, including:
- Sustainable Site Design: We design green spaces, utilities, and transportation infrastructure that connect our buildings and parks, moving people between them. Our background in watershed planning and site design gives us a unique perspective that leads to practical and meaningful design solutions.
- Stormwater Engineering: We provide solutions that effectively manage stormwater runoff while minimizing the environmental impact.
- Value Engineering: We help clients get the most out of their budget by identifying cost-effective solutions that meet their needs.
- Master Planning: We offer early planning, feasibility studies, and existing site condition assessments to provide early guidance that supports cost estimating used for acquiring funding via grants.
Our Projects
Our portfolio includes projects such as parks, public spaces, K-12 schools, higher education facilities, early learning centers, stormwater retrofits, non-profit site development, and other public projects. We take pride in our commitment to sustainability and our ability to adapt to each client's unique needs.
Our Team
Our team is comprised of experienced professionals who are passionate about sustainable design and committed to making a positive impact. Our team leaders have extensive experience in civil engineering design and development, with a focus on environmental sustainability.
- Robin McKennon Thaler, PE, LEED AP: As a LEED-accredited professional engineer, Robin specializes in the design and planning of projects that prioritize environmental sustainability. With 25 years of engineering experience, Robin has a strong background in civil engineering design and development.
- Casey Jeszeck, PE: As a senior engineer, Casey has a diverse range of experience in site development and parks projects. He is passionate about providing innovative and forward-thinking approaches to stormwater management that meet client needs and benefit the environment.
- Elaine Guo, LEED AP: Elaine is a LEED-accredited professional with a master's degree in environmental engineering from the University of Washington. She is passionate about stormwater engineering and design, and is committed to continuing her education and learning about sustainable design.
- Bethany Steadman, PE: As a project manager, Bethany has extensive experience in K-12 projects, from master planning to construction administration. She is passionate about stormwater management solutions that are both environmentally friendly and meet client needs.
- Ellie Elefson, EIT: As a design engineer, Ellie has experience in water quality and treatment, as well as stormwater design. She is passionate about design solutions that benefit both building functionality and the environment.
Let's Work Together
At Mayfly Engineering + Design, LLC, we are committed to creating innovative and sustainable solutions that meet the unique needs of our clients. If you're looking for a partner who shares your commitment to environmental stewardship and community engagement, we'd love to collaborate with you.
Company Reputation
The reviews provided convey mixed sentiments about the company. Some reviewers praise the professionals they have interacted with, highlighting their talent and strong resumes. Others voice discontent with their experiences, citing rude treatment by company representatives.
Talented Professionals
Robin has been praised by Brook Jacksha, a civil engineer who has worked with him on multiple projects. Jacksha credits Robin with having a strong resume of successful projects at any scale. Similarly, Samuel Shao anonymously gave Robin five stars, likely due to his professional reputation.
Poor Customer Service
On the other hand, Tia Teo had a disastrous interaction with a company representative named Robin. Teo attempted to request a proposal and was met with extreme rudeness. When Teo called back to correct the misunderstanding, the representative continued to be unprofessional, leading Teo to advise others to take their business elsewhere.

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