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What Our Clients Are Saying


Jim Dunbar 

We have worked with D Spencer Engineering on several building projects over an eight year period. They have provided mechanical engineering and drawing support for projects ranging from new restaurant construction to fire suppression systems. Their team of engineers and draftsmen are always professional and timely. We are currently working with them on a new project, and will likely use them again on any future project. I would highly recommend them. 

Big Woods Restaurant Group

Hard Truth Distilling Co.

Quaff ON! Brewing Co. 


Ryan Lindley

I have worked with Spencer Engineering several times over the years.  Being a civil engineering project manager and designer, it is key to communicate and pass along information to tie a project together between the civil world and MEP world.  Don and his staff are responsive, accountable and provides a project with sound MEP design.  I have enjoyed working with Spencer Engineering and look forward to collaborating on many more projects in the future.

Banning Engineering PC


Jack J. Kibort, PE

I have known Don Spencer before he started his own company from a single individual to a firm of 10-15 individuals in 10+ years!  Don is a professional with high integrity, and communicates with his clients.  I have worked with Don on a number of projects and know firsthand that he leaves the project with the design working properly.  Existing and future clients will be satisfied with his team’s performance.  


Thanks for asking as it been a pleasure working with you over the years!

Hydronic & Steam Equipment Co., Inc.


Tom Walter

I have often told my customers (the Owner) that no project can afford a perfect set of Construction Documents.  That being said, every project discovers design obstacles.


Without a doubt, your team has been most responsive in working with us and the contractors to resolve issues promptly and affordably. 


You have assembled a talented group of design professionals for which you should be proud.


President and CEO

LINK Management, Inc.


Tom Hall

I have worked with Don for over 20 years in the Indianapolis market.  His breadth of MEP project experience is unmatched.   He and the team of engineers he has on staff are dedicated to designing the best system for his clients.   He has always been easy to communicate with and work with over the years.   I look forward to working with him and his team at D Spencer Engineering!

Colby Equipment


Rick Renschen

I have worked with Don Spencer and Spencer Engineering for 27 years and he is a stand up guy that does the right thing, takes responsibility when its appropriate, and tells it like it is.  Spencer Engineering does all of our MEP work across the country and they complete their work with exceptional design solutions on time and with a high level of detail.  We demand a lot out of their team, and they have stood up to the challenge every single time.  We truly appreciate the work they do for MD Architects.

MD Architects

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