management

DAN SPITZA, PE, VMA
President

Dan started his career in Arizona in 1985 and joined the Achen-Gardner team as an estimator and project manager in April 1998. Dan possesses all of the necessary experience and knowledge to participate and understand all phases of any project. His years in the southwest area construction industry, impressive background as a registered professional civil engineer, and grass roots experience having held positions ranging from project engineer to project superintendent to design phase manager have enabled him to effectively evaluate the construction methods and management systems at Achen-Gardner in order to achieve new levels of excellence. His efforts have been rewarded with steady increases in Achen-Gardner’s competitiveness, annual volume, and market share.  

Dan is currently serving on the Board of Directors for the Arizona Chapter Associated General Contractors and is an active member of AWA, DBIA, and the Arizona Chapters of AGC, APWA, and ACEC. His expertise and ability to establish important professional relationships has been instrumental in Achen-Gardner’s recognition as one of the most respected heavy/highway construction companies in the state of Arizona.

Dan is a second generation civil engineer born and raised in the Milwaukee, Wisconsin area and holds a B.S. in Civil Engineering from the University of Wisconsin (Madison, WI). He has two boys, Jack and Max.

KEVIN NUNEZ
Vice President, Chief Estimator

Kevin joined the Achen-Gardner team in August 1994. His commitment to increasing his knowledge and experience, as well as his dedication to Achen-Gardner’s pursuit of construction excellence have made him an incredible asset to the company and the construction industry. Kevin’s work ethic and detailed attention to developing Achen-Gardner’s best management practices have allowed the Achen-Gardner team to consistently deliver high-quality award-winning projects for our clients.  

In the construction industry since 1989, Kevin’s experience includes estimating, construction engineering, design engineering, and project management. His direct involvement and supervision of field personnel has enabled him to successfully complete projects on time and within budget. His many responsibilities include supervising contract negotiations and administration, providing technical support to field supervision, and maintaining a key role in insuring the accurate accounting of productions, quantities, and associated costs.

Kevin was born and raised in Arizona and holds a B.S. in Construction Management from Arizona State University (Tempe, AZ).  Kevin is married and has three children, Cody, Cailey, and Cory, and three grandchildren.

BRYAN MUELLER
Vice President, Project Executive

Bryan has been in the construction industry for more than 32 years. He was born and raised in St. Charles, Missouri and after college, he moved to Arizona to work as a Project Engineer / Project Manager. For the first 12 years of his career, he worked all over Arizona, California, Oklahoma, New Mexico, and Nevada. After Bryan met his wife and started a family, he moved into estimating. He started as a Senior Structural Estimator and then served as a Chief Estimator for almost 10 years. Bryan joined Achen-Gardner in March of 2022 and is our Vice President / Project Executive. He brings an impressive background in all aspects of heavy civil construction, and he will continue to leverage his knowledge, experience, and relationships in support of all our employee-owners to ensure our growth and success.

Bryan and his wife, Alisa have two kids, Jake and Everly. They are happy to call Chandler, Arizona their home.