Our Leadership

John Diesslin
John Diesslin, President

John Diesslin is the President and CEO of Diesslin Structures, Inc. and has a Bachelors of Science in Architectural Engineering from the University of Colorado. John is a lifelong Chaffee County resident and is involved with many local industry and service organizations. John oversees DSI’s commercial and residential projects, from cost estimating, scheduling, superintendent and project manager selection to constructability, labor placement, and quality control.


Kevin Diesslin, Vice President / General Superintendent

Kevin Diesslin is a lifetime Buena Vista resident and Buena Vista High School graduate. He began working for DSI as a trade foreman and has advanced to General Superintendent. Kevin is responsible for coordinating work in the field, on the spot problem solving, safety training and maintenance, quality of workmanship, and schedule adherence. He was DSI’s Superintendent on the 28 million dollar Heart of the Rockies Regional Medical Center and also served as General Superintendent on the Salida High School project, Buena Vista Public Library, Chaffee County Jail renovation, Buena Vista True Value Store, the Colorado Mountain College (CMC) Climax Molybdenum Leadership Center, the Salida High School Best Grant Project and the CMC Edwards renovation, as well as many other projects.

Clint Mays
Clint Mays, Project Manager

Clint Mays joined DSI in mid-2013 after 30 years in General Contracting, CM at Risk and Design-Build in the Industrial, K-12, Higher Ed., Commercial Office, Hospitality and Corporate Services markets. He has a BS in Construction Management from Colorado State University and enjoys working closely with clients and designers early-on to assist the team with cost effective solutions.

Brian Smith
Brian Smith, Superintendent

Brian Smith is a Salida High School graduate. He started with Diesslin Structures, Inc. in 2004, and with hard work and dedication, has worked his way up to Superintendent. He served as Field Superintendent on the Heart of the Rockies Regional Medical Center Remodel and the Monarch Ski Area remodeling project. Brian has worked on numerous projects for DSI and has proven himself time and time again.


Frank Perri, Superintendent

Frank Perri is a Salida High School graduate, who began working as a Superintendent for DSI in 2009. Frank is an exceptional carpenter with unique personal qualities that make him a natural leader in the field. His excellent problem-solving abilities are evident in the quality of the workmanship on his projects. Frank has constructed several custom homes in Chaffee County, built a dental office in Buena Vista and the Salida Early Childhood Center Addition, and served as DSI’s Superintendent on the multi-million dollar Crestone Charter School.


Rocky Mazza, Superintendent

Rocky joined the DSI team in 2015. Rocky is the Manager of our Dirt and Utility division, and brings 15 years of comprehensive experience in utility and dirt construction to the DSI team. Rocky’s past roles include being a site superintendent for dirt and pipe on large water treatment plants, as well as utilities and road superintendent on subdivision development. Rocky is a dedicated employee with a focus on producing quality work while maintaining a safe and secure jobsite.

Glen Photo
Glen Mussetter, Superintendent

Glen is a graduate of Buena Vista High School and began his construction career as a Tunnel Form Carpenter at the Climax Molybdenum Company in Climax, Colorado.  Working on several multi-million dollar projects in the capacity ranging from Journeyman Carpenter, General Foreman, Field Superintendant and Project Superintendent. Glen’s wide variety of knowledge is an asset to any project.


Greg Hammond, Superintendent

Greg is a life long resident of Salida and a graduate of Salida High School. His career with DSI began back in 2004 when he joined our concrete crew. Greg boasts years of experience working in large scale concrete projects such as the Salida High School, Crestone and Moffat Schools as well as The Heart of the Rockies Regional Medical Center. In 2014, with Greg’s vast knowledge and experience he rose the ranks to become a Concrete Superintendent.