We believe that the prosperity of any project lies within the relationships among management.
From day one, our estimators, superintendents, project managers, and project engineers are involved from day one on any project – whether it be design-assist or submitting a bid.

The highest costs in construction come from complications that occur along the way. Tight budgets, costly building code issues, historic preservation, rigorous schedules, hazardous material abatement, and phased construction are all problems that come up frequently. We have the resources to simplify these complexities, saving time and money. Spectrum saves project dollars throughout the life of the project. Our client and architect references testify to our consistent success at meeting our goal of Client Satisfaction.


Spectrum General Contractors is a second generation, and family-owned firm centered around relationships. Our corporate focus on building partnerships applies to our employees as much as it does for our clients and peers in the community.

We value the contributions of each employee and are committed to ensuring that they can take pride in their work as well as have a fulfilling career. We strive for Spectrum to provide uniquely rewarding work experience. We believe that our team agrees as evidenced by our low employee turnover rate, and the fact that we have had multi-decade relationships with many of our employees. In multiple cases, generations of families have called themselves part of the Spectrum team.


Brion Doyle

President – Spectrum General Contractors

303-377-1218 /

Brion joined Spectrum General Contractors in 2003 as a Project Manager and was promoted to President in 2015.

Brion personally oversees and coordinates all company projects regardless of scale. During his time at Spectrum, Brion has established an extensive background in multi-family & single-family residential construction, historic projects, restaurants, adaptive re-use, ground up buildings, and commercial construction. Brion holds a degree in Construction Management from Colorado State University.

John Lanphier

Vice President – Commercial/Residential

303-515-5433 /

John is a native of Colorado, born and raised in Denver. He graduated from the University of Colorado, Boulder. Previously John owned and operated his own company for seven years which dealt with high end home remodel, specializing in custom design/build projects. His experience ranges from restaurants, remodels, historic renovations, to commercial retail space.

Graham Johnson

Vice President – Historic/Restoration

303-515-5442 /

Graham received his undergraduate degree in Architectural Engineering from the University of Colorado, Boulder and his Masters of Science in Historic Preservation for the University of Colorado, Denver. He has worked across the Front Range and throughout the State on many preservation efforts ranging from small restorations to complex multi-year adaptive reuse projects.  Graham is a second term member of the Board of Directors for Colorado Preservation Inc., an adjunct faculty in the Historic Preservation Department of the College of Architecture and Planning at the University of Colorado Denver and an appointed member of the Denver Landmarks Preservation Commission.


Wade Warden

303-944-2469 /

Wade has an extensive background in commercial construction. He has been involved in the Denver building industry for over 20 years, and spent most of his career as a construction superintendent before joining the project management team. Wade has experience in tenant improvement and large building construction, as well as warranty management and preventative maintenance.

Anson Brown

719-648-9429 /

Prior to joining Spectrum, Anson worked for restaurant groups in Colorado and Oregon, serving as owner’s construction representative, Controller and Director of Operations. As Owners Representative he has overseen build-outs for more than 10 restaurants of different concepts ranging from 2,000 to 15,000 square feet. Anson is a Colorado Native and has a Bachelor of Science in Business Administration with an Emphasis in Operations Management from University of Colorado Leeds School of Business.

Jonas Landes

607-342-1211 /

Jonas has dedicated the entirely of his professional career to the preservation of historic buildings and structures throughout the United States and, at last count, he has worked on over 400 historically significant buildings in 35 states and territories. Jonas has two kiddos under the age of ten, one wonderful wife (slightly over the age of ten), and a wonderful Australian Shepherd. When Jonas is not saving buildings he is busy backpacking, fishing, and cross country skiing in all places wild. Jonas holds an MA in American Studies/Historic Preservation from the University of Wyoming and a BA from St. Lawrence University.

Prior to joining Spectrum Jonas co-founded and grew HistoriCorps into a thriving non-profit that annually rehabilitates 50-60 historic buildings throughout the United States. HistoriCorps’s unique model includes engaging students and volunteers in the hands-on preservation of historic properties such as lighthouses, fire lookout towers, mine and ranch buildings, rustic resorts, and entire ghost towns.

Jeff Hartman – Field Operations Manager/Safety Manager

303-598-0346 /

Over the past 40 years Jeff has held many roles in the construction industry, progressing from a carpenter to superintendent, safety officer, project manager to construction division manager. Jeff is passionate about working with a talented team at Spectrum and keeping them safe. He enjoys visiting the mountains with his children and grandchildren.