Established in 1989, Achen-Gardner Construction, LLC is led by Dennis Troggio, his longtime partner John Walstrom and new partners, Dan Spitza and Kevin Nunez. Together they have shaped Achen-Gardner into the industry leader it is today.
Dennis and his partners take great pride in the organization they have built and the quality services their teams provide. Evidence of our distinct company culture can be seen in the level of trust and respect our clients have for us and the pride our employees take in being part of the Achen-Gardner family. Known as an industry leader in delivering complex roadway and wet utility infrastructure projects, our firm is consistently ranked as a top ten general contractor (re: Ranking Arizona Magazine) and often described as an employer of choice.
Well established in Arizona, we continue to expand our operations and are also licensed in Colorado and New Mexico. Our firm is poised and confident in our ability to deliver the same high level of service and quality throughout the southwest.
"We embrace the challenges of our industry. Without change we are not putting our organization out on the limb, not striving for our full potential. We also endeavor to establish positive relationships whether we are dealing with individuals, owners or subcontractors.
If you treat people with dignity and respect and instill pride of ownership, long lasting relationships will be created.”
- DENNIS TROGGIO, CEO
Dennis has been with Achen-Gardner since 1989 when he was hired as Vice President to start the Heavy Highway Division. Since that time, his vision and leadership have taken a division that completed $750,000 worth of contracts in its first year to the Achen-Gardner of today, which has completed projects in excess of $1.5 billion. He has led the organization in completing more than 700 projects throughout Arizona. Dennis has given back to our industry and served on the Board of Directors for the Arizona Chapter Associated General Contractors for 20 years. He also served as Chairman of the Arizona AGC in 2006.
John joined Achen-Gardner’s dynamic team of construction professionals in April 1991. Starting as general superintendent, John’s superb management and leadership skills resulted in a fast track to his current responsibilities as President. His ability to set new standards within the ever-changing and highly competitive construction industry made him the natural choice to become a co-owner in 1999.
DAN SPITZA, P.E.
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.
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 and resulted in Co-owner responsibilities.