Management Team:

Jim Whelan


Jim Whelan has been President of A to Z Roofing since 2007. Prior to his position at A to Z Roofing was in sales and management for JEH and Premier Roofing supply. Jim Whelan has sat on the codes commission for the Colorado Roofing Association and has been an active member since 2007. With over 18 years of experience in the roofing industry Jim brings a great deal of knowledge to A to Z. Jim has received extensive training in both product knowledge and applications of various types of roofing. His commitment to quality and service has made A to Z Roofing one of the top roofing companies along the Front Range. Jim Whelan is a graduate of Colorado State University and has called Colorado his home since 1989. Jim resides in Highlands Ranch with his wife of 22 years and their 3 children.

John Granville

CFO, Treasurer

John Granville has been with A to Z Roofing for the past 7 years, and has been an active member of Denver’s small business community for over 30 years. John Granville is originally from St. Louis, MO. He migrated to Denver to attend the University of Denver where he received a BSBA in Management. He has been married for 30 years to his realtor wife, Brooke. They have three grown children and a grandson. John is an avid golfer and tennis player. He also enjoys following the Rockies and Broncos. John Granville sits on the board of Habitat Interfaith Alliance, an interfaith group of fourteen faith groups dedicated to building affordable housing for those less fortunate through Habitat for Humanity. His responsibilities at A to Z roofing include overseeing the accounting, finance programs, and tax responsibilities, managing the marketing, insurance, IT and HR areas.

Jennifer Florea

Office Manager

Jennifer Florea has been with A to Z Roofing for the past 6 years. With over a decade in the construction industry, Jennifer brings Fortune 500 experience to a small, local business. Jennifer Florea is a Colorado native, and is happily married to her husband, Josh. She also loves to spoil her rescue dog, Harrison and her baby girl, Jaylene. Job at A to Z Roofing: Answering your phone call! (You talk to a person at a desk, not a phone in a truck), Connecting you with a knowledgeable A to Z Roofing professional, Working with your insurance provider to ensure that your claim is executed properly, Insurance billing, Warranty registration, City and County inspection scheduling.

Corey Largen

Production Manager

Bio coming soon!