Diesslin Structures, Inc

As we mark 25 years in business, we proudly reflect on the guiding principle that has shaped the legacy of Diesslin Structures, Inc.:

BUILDING MORE THAN A REPUTATION

Our services go beyond those of a traditional contractor, offering comprehensive CM/GC solutions tailored to meet the needs of our commercial clients. This includes expert pre-construction and construction management services, strengthened by established, trusted relationships with local subcontractors. Over the years, DSI has successfully delivered projects valued over $200 million, spanning from the Vail Valley to Fremont County, WY, with project sizes ranging from $5,000 to $44 million.

Our approach to construction emphasizes open-book collaboration and professional teamwork. We are committed to providing the most qualified and experienced professionals in project management, field supervision, and skilled trades. By utilizing detailed estimating, scheduling, and project management tools, we ensure safe, high-quality results that are on-budget and on-time.

Collaboration is at the heart of our process. We recognize that this project is about your vision, not ours. While we bring valuable insights from similar projects, we focus on understanding your unique needs and goals, ensuring that every solution is tailored specifically to your requirements.

Our Leadership

John Diesslin, President | CEO

John Diesslin is the President and CEO of Diesslin Structures, Inc., founded in 2000. He holds a Bachelor of Science in Architectural Engineering from the University of Colorado. A lifelong resident of Chaffee County, John is actively involved in numerous local industry and service organizations. He oversees all aspects of DSI's commercial and residential projects, including cost estimating, manpower and equipment scheduling, constructability, and quality control. John is dedicated to ensuring that every project receives the attention it deserves to meet client expectations. Additionally, he plays a crucial role in fostering strong partnerships with the local building department, public works department, utility distributors, and architectural and engineering firms.

Kevin Diesslin, Vice President

Kevin Diesslin is a lifelong resident of Chaffee County and a graduate of Buena Vista High School. He began his career with DSI as a trade foreman and has since risen to the position of Vice President / General Superintendent. Kevin is responsible for overseeing quality control, constructability, manpower and equipment scheduling, safety, and field operations. He has served as the superintendent for many of Chaffee County’s largest commercial construction projects. In addition, Kevin has played a key role in several joint venture projects, providing leadership and overseeing the overall direction of construction activities. His exceptional leadership ensures that DSI consistently completes large-scale projects on time and within budget.

Nichole Imm, CFO

Nichole brings over 15 years of experience in accounting, financial management, and business operations to DSI. With an MBA in Accounting, Nichole oversees all financial operations at DSI, including budgeting, cash flow management, and financial reporting. Her extensive background in financial control, including her previous role as Financial Controller, allows her to implement strong internal controls and ensure compliance with tax regulations. Nichole also manages audits, forecasting, and strategic financial planning, working closely with DSI’s leadership team to drive growth and maintain financial integrity. Her dedication to excellence and strong problem-solving skills are key in supporting DSI's mission and long-term success.

Rocky Mazza, Civil Division Manager

Rocky joined Diesslin Structures, Inc. in 2015 and currently serves as the Civil Division Manager for the Dirt and Utility division. With 15 years of experience in equipment operation, utility, and dirt work construction, Rocky brings a wealth of expertise to DSI. He is responsible for overseeing all aspects of civil construction, including site preparation, utility installation, and infrastructure development. As a manager and superintendent, Rocky leads a team of civil employees, ensuring high-quality work while maintaining a safe and productive job site. His duties include scheduling manpower and equipment, managing project logistics, and ensuring that all work complies with safety standards and project specifications. Rocky’s leadership and organizational skills are instrumental in the successful completion of complex civil construction projects on time and within budget.

Project Management Team