MMY People


At MMY, we’re friendly, creative structural engineers with personality and a sense of humor. Sound like an oxymoron? Well, it’s not. Our professional, fun culture puts you at ease, brings out the best in our staff, and gives you the innovative, sound, safe design solutions you need and want—quickly and affordably.

Read more about MMY the company.

Send an email or print a resume (PDF) for our team listed on this page.

David H. Macdonald, P.E., Principal

David Macdonald
David has over 30 years of experience in structural engineering which includes all phases and types of structural building systems and is one of the Principals of Mattson Macdonald Young. He has served as project engineer for several projects that have won awards for unique and innovative design. | David H. Macdonald’s resume

Stephanie J. Young, P.E., Principal

Stephanie J. Young
Stephanie has over 25 years experience in the design, analysis, and construction coordination of many types of structures. Her major strengths include a proficiency at problem solving, an orientation toward detail and an understanding of construction concerns. She became a shareholder in 1998 and is now President of the firm. | Stephanie J. Young’s resume

Joseph Cain, P.E., Partner

Joseph Cain
Joe has been working in the field of structural engineering since 1985 and is a partner of MMY. Joe has been the project engineer for a wide range of commercial, and government projects. | Joseph Cain’s resume

Ken Green, P.E., Partner

Ken Green
Ken has been in the structural engineering field since 1989; joined MMY in 2006; and became partner in 2012. He’s developed a specialty of light-guage framing and curtainwall system design and public art projects—designing structures in stainless steel, aluminum, fiberglass, and composite wood-fiberglass materials. | Ken Green’s resume

David Hedberg, P.E., Design Engineer

David HedbergDavid started his engineering career in 2013 and later joined Mattson Macdonald Young in 2017. He has worked on a wide variety of projects, from brand new buildings to renovations of existing structures. | David Hedberg’s resume

Adam Neigebauer, P.E., Design Engineer

Adam NeigebauerAdam joined us in 2014 and brings unique experience to our group, including condition and façade studies, materials specifications, and engineering forensics. He has since expanded his skillset into designing building structures and homes. With a curiosity for tools and materials, he is a craftsman at heart, and designs things he can envision putting together himself. | Adam Neigebauer’s resume

Isaac Bliek, Engineer in Training

Isaac BliekIsaac joined MMY full-time in summer 2019 after spending the previous two summers as an intern. He is gaining valuable experience through traditional projects, and appreciates unique, atypical projects that foster creative thinking. | Isaac Bliek’s resume

Jordan Hurst, Engineer in Training

Jordan HurstJordan joined MMY in 2016, and works to develop his engineering acumen on a daily basis. He strives toward becoming a well-rounded engineer through projects that vary in material and clientele alike. | Jordan Hurst’s resume

 Andrew Ostman, Engineer in Training

Andrew Ostman | Andrew Ostman’s resume – coming soon

 Charles Vermace, Engineer in Training

Charles Vermace Charles joined MMY in spring of 2018. He brings a diverse background in design of  industrial structures, historic renovations, and vibration abatement. | Charles Vermace’s resume

Cathy Beck, Engineering Technician

Cathy Beck
Cathy has worked in the field of structural drafting since 2002, and recently joined MMY in 2018. Cathy brings a wealth of experience to our team, having worked on many existing building renovations, as well as additions to schools and churches. | Cathy Beck’s resume

Melissa Breiter, Engineering Technician

Melissa Breiter

Melissa joined MMY in 2006 as an Engineering Technician. Melissa uses both AutoCAD and Revit Structure to create 2D plans and 3D models. She enjoys the wide variety of projects we work on at MMY, including everything from sculptures and park shelters to barns, houses, apartments, offices, and large warehouses. | Melissa Breiter’s resume

Melissa Daluge, Engineering Technician

Melissa Daluge
Melissa has been in the fields of architectural and structural drafting since 2000. Since joining MMY in 2001 as an Engineering Technician, Melissa has been involved in a wide variety of projects, from the Higher Ground Shelter in Minneapolis to Roseville’s Sienna Green Apartments and Maple Grove’s Hennepin County Library. | Melissa Daluge’s resume

David L. Hoepner, Engineering Technician

David L. Hoepner
David has been with the firm since 1986. He started as a drafter and, through his experience and education, has been relied upon as Designer/Technician. David is thoroughly experienced in AutoCAD drafting and design, and enjoys handling construction administration and site work for a number of our projects. | David Hoepner’s resume

Jennifer Miggler, Office Manager

Jennifer Miggler
Jen has overseen the in’s and out’s of MMY since early 2017. She manages billing, payroll, accounts, and all other pertinent duties to keeping our office running smoothly. Simply put: we’d be lost without her.