Donald Harrington
Managing Consultant
Denver, CO
Don Harrington is a Managing Consultant with Aperture (formerly Sage). At Aperture, Don specializes in construction defect, cost estimating, damage, and schedule delay analysis related to residential, commercial, and civil projects. With over 55 years of experience in the construction industry, including 40 years of experience in preparing and analyzing construction claims, Don has provided expert analysis in hundreds of cases. Experienced in testifying, Don can apply his expert analysis to the court room and has given testimony in depositions and trials numerous times.
Bachelor of Science in Civil Engineering, 1979
Construction Supervisor Class B Certificate, Aurora #1916015
Construction Supervisor Class B Certificate, Denver #1013280
AIC – Certified Professional Constructor (CPC)
Aperture, LLC, (formerly The Sage Group), Denver, CO, December 2022 – Present, Managing Consultant
The Sage Group, Denver, CO, 1994 – 2022, Vice President
- Preparation and resolution of contract dispute claims
Okes & Associates, Inc., Englewood, CO, 1987 – 1994, Senior Consultant
- Preparation and resolution of contract dispute claims
Lincoln Property Company, Englewood, CO, 1984 – 1987, Construction Manager
- Managed the Construction Division of property development
Kellogg Corporation, Littleton, CO, 1980 – 1984, Senior Engineer
- Preparation and resolution of contract dispute claims
Western Heritage Company, Lakewood, CO, 1978 – 1980, Construction Manager
KB Enterprises, Boulder, CO, 1975 – 1978, President
- Builder of residential and light commercial projects
Various construction companies, 1971 – 1975, Carpenter Foreman
American Bar Association (ABA)
American Institute of Constructors (AIC)
Associated General Contractors (AGC)
Association for Advancement of Cost Engineering (AACE)
Construction Financial Management Association (CFMA)
Rocky Mountain Surety Association (RMSA)
Professionals for Colorado Contractors Council (PCCC)
Construction Defect
Cost Estimating
Damage Analysis
Schedule Analysis
Surety Work