Team Members

Michael Smith

Commercial Project Manager

General Michael is a seasoned construction project management professional with a BS in Construction  Management and an MBA in Finance. Currently, acting as our General Contractor for the Commercial Construction Division of Sustainable Design Build, Michael brings a large swathe of experience and knowledge. His skill set and knowledge that has been hardened out in the field and honed in the classroom guarantees SDB’s commercial construction endeavors will meet their goals. Outside SDB, Michael loves to spend time with Daughter and 

Ricardo Castillo

Construction Superintendent

Ricardo brings a wealth of knowledge and skills to the Sustainable Design Build’s commercial construction division. With over 17 years of construction experience, Ricardo has seen countless projects through to the end. From coordinating construction to managing entire teams, he has the highest qualifications to operate in the construction industry here in Denver. Boasting a degree from the Universidad del Valle de Mexico, Ricardo studied industrial and systems engineering. 

Josh Pingel

Project Manager

Josh Pingel, originally from New Hampshire, started his construction career in the hotel renovation industry which gave him a keen eye for detail and finishes on a commercial level. Afterward, he expanded his skill set and moved into a position for commercial framing and drywall which gave him the edge in overseeing larger scale projects. His work experience translated into SDB’s carpenter team as a site superintendent. When he is off-site or out of the office, Josh likes to hit the slopes and snowboard as much as possible. 

Derek Roth

Design Manager

Derek has been in residential construction for more than half of his life. He started working under his father fixing up dilapidated properties in Cincinnati Ohio. After graduating from Miami University he knew he wanted to get back into construction so he moved to Tennessee and began flipping homes. His goal was to always move out to Colorado and in 2018 he was finally able to make the move with his girlfriend Julia. In his free time you can catch him camping in the summers or climbing 14ers with his dog Reggie. In the winters if he is not working there is a good chance you can find him in the mountains on his snowboard. 

Luke Zygmunt

Site Supervisor

Born and raised in Grayslake, IL. Luke was brought up with a tool in hand learning his trade from his family who were a wealth of construction experience and knowledge. A bit of a renaissance man, Luke loves to cook, bake, paint, play music, and build things. He craves the outdoors and adventure is always calling him which is ultimately how he found his way here to Colorado. Luke plans on building his own self-sustaining homestead somewhere in this mountain paradise. But until then, he enjoys advancing his skills within the construction industry and working with SDB.

Tommy Zygmunt

Carpentry Team

The reason Tommy moved from Illinois to Colorado, in his own words, is “Because of everything I love is here”.  And that seems to check out, he has an appetite for mountains, amazing food, thriving music scene, hunting, fishing, and so on. As we all know, Colorado has them all in spades. In his free time, Tommy enjoys writing and producing his own music, snowboard, hiking, and just about anything that involves adventure. Tommy hopes one day to own some land, build a home, and build a music studio in this wonderful State.

Eric Milburn

Carpentry Team

Eric is a carpenter originally from Wisconsin but is now living in Denver, Colorado since 2016. Before SDB, Eric ran large-scale events and worked for various nonprofits including TEDx Talks. Eventually, Eric changed careers leading him to take his thoughtful approach to task and project management into construction. Eric has always had a love for building, especially when sustainability is at the forefront of design. His growing passion for sustainable building practices fuels his goals to create more eco-friendly products that eliminate waste, such as hempcrete! When not at work, Eric can usually be found in the mountains with his wife and dog. Snowboarding, camping, backpacking and swimming are key reasons he has moved to Colorado. “I am proud to call Denver home and intend on making it a more beautiful place in the coming decade.”

Julie Barcelon

Accounting

Julie is certified pro and head accountant for Sustainable Design Build. She brings organization to our business, going above and beyond in providing accurate numbers for clients and partners alike. Her goals with SDB is to help build up company and be a part of its growth. Outside of the office, Julie likes to clear her head by riding her motorcycles with her husband!

Thomas Greiman

Marketing Manager | Pre-Con Admin

Thomas oversees the online presence and marketing of SDB – he is responsible for ensuring SDB services are in front of those who need it. Beyond that, Thomas is also a part of the pre-construction team. He has experience in the early processes of Denver’s Developmental Services and works to coordinate with teams for better review timelines. Thomas enjoys spending time with his dog Macaroon and getting up to the mountains.

OFFICE DOGGOS

Poppy

This beautiful girl here is quite possibly the fastest hound around. With a quirky attitude and cheerful personality to match. Poppy is the ideal pal but watch out, she likes to pull pranks.