Founded in 2009, our professional design team offers over 60 years of cumulative structural engineering design experience.

Willis Engineering, Inc. is a full service structural engineering firm specializing in projects for the residential building sector. We offer our clients a wide spectrum of services with a focus on client service, quality, reliability, integrity, timeliness, and ingenuity. We have extensive experience in most residential project types from remodels and additions to single family custom and production housing to large scale multi-family complexes. We are licensed in multiple states with our center of operations located in Phoenix, Arizona.

Our engineering design professionals are instrumental to the success of your project and we welcome the opportunity to be part of your team so that, together, we can meet the objectives of your projects.


  • Building Structural
    Design Services

    Our team's core competencies are in the the design and planning of new structures.

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  • Offsite Structural
    Design Services

    We can develop either an off-site capability or improve your existing capability.

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  • Value Engineering
    Review Services

    We can improve your building's value and help define the ratio of function to cost.

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Preview some of our work.

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    Custom residential in Scottsdale.

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    Multi-family homes in downtown Phoenix.

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    Retail building in Metro Towne Center.

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What our customers say about us

  • Willis Engineering has proven time and time again that they are the best structural engineering firm available. Mike Willis and his team have far exceeded expectations on every project that has come their way regardless of its size, complexity or budget. Their professional knowledge and attention to detail has resulted in the smoothest running projects from conceptual design through the construction phase. Mooney Design Group has been associated with Mike Willis and his staff for the past 18 years and has designed over 200 custom homes

    together. This loyalty is due to the attention to detail and customer service that goes into every single project. Willis Engineering has been a vital part of the success of Mooney Design Group and I will be forever thankful for their service.

    Thomas Mooney
    Mooney Design Group, Inc.

  • I have been working with Mike for over 10 years and have found him to be consistent in all assignments presented, diligent on his deadlines, and efficient in his methods of Structural Engineering. Mike is a "Lets make this work" person who is able to present creative and efficient Structural solutions that benefit the Client. A great asset of Willis Engineering is a "Collaboratively and Efficient" work ethic that makes for a seamless process which benefits our working relationship, but more importantly, the "Clients" bottom line. Willis Engineering will

    comfortably work with any group of professional consultants and clients providing professionalism with a well-balanced blend of competence and experience. I highly recommend Willis Engineering, Inc.

    David R. Maldonado
    D33 Design and Planning

  • Willis Engineering, Inc. has provided quality structural engineering services for projects I have managed for many years now. They have always provided consistent quality that has led to limited field issues and plan check comments. I feel confident that homes we build are structurally sound, efficient, and easy to build. I have appreciated their input on value engineering which has improved our designs and supported the bottom line through efficiencies and cost savings. Always willing to help whether it is directly related to field conditions

    or pre-planning for new projects, Mike and his team are a valued member of our "virtual team".

    Jack McSweeney
    National Top Ten Builder

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