"You have my unwavering commitment..."

Thank you for the opportunity to share our services with you. You may be asking yourself why you should choose Commonwealth for your project from among all the other firms out there. I'd like to share with you the three principles which I believe set Commonwealth apart from our competition. You see, “Connect with Confidence” is more than just a slogan around here. In fact, earning your confidence is my personal mission each and every day. That’s why we promise that, when you work with us, you will experience:

When you hire Commonwealth, you don’t have to wonder whether you can trust the information and advice you are receiving. Every day, we provide world-class engineering and consulting for clients across the United States and around the world. You don’t stay in business for as long as we have without working tirelessly to earn and uphold a reputation for technical excellence and operating with the highest integrity. At Commonwealth, we value our relationships and act accordingly – always.

Commonwealth's roots trace back to 1888, so if there’s an engineering challenge out there, we’ve most likely already encountered it and can readily offer solutions to meet your project’s specific needs. You won’t find more hands-on experience, greater technical superiority, or a deeper pool of knowledge from which to draw. Simply put, when you hire Commonwealth, you put the toughest arsenal available at your disposal.

No matter how large or small your project is, you will never be a number to us. That’s simply not the type of firm we are. Commonwealth is 100% employee-owned and -managed. We take the time to listen to your specific needs and find customized solutions to meet them. Our one goal is achieving yours.

As our team knows, my door is always open. You have my unwavering commitment to ensure that our services meet your expectations and standards. If you have questions or concerns, don’t hesitate to contact me.


Name: Dennis F. DeCosta, P.E.

Year Assumed: 2001

Q: What is your favorite part of the day?

A: It has to be coming into work in the morning and seeing all the cars filling the lot and seeing the overflow areas and then walking in the door and seeing people hustling and bustling in the hallways and doing their jobs. This growth is invigorating, not just for me, but for the entire Commonwealth team.

Click HERE to learn more about Commonwealth's Leaders of Innovation.