Dave Harrison is a Sr. VP Chief Marketing Officer at GAF. Colleagues describe him as "I met Dave Harrison when we were developing the initial concept for Roof Express, a software tool that serves the commercial roofing industry. Almost immediately, Dave challenged my basic business assumptions and our preliminary marketing and sales strategy in a way that was initially difficult to accept. But, once I checked my ego, Dave's input turned out to be among the best business advice I've received in this business - and it has helped us be a better company. Over the… Show more" and "Dave Harrison is the ultimate business leader. Dave is a creative, intellegent, strategic, hands on executive with a proven track record of superior success. As a vendor to Dave I see him setting high expectations of his people and vendors while always maintaining a sense of fairness with accoutability. He has a deep skill set and a wide range of experience in multiple industries. I give Dave my highest recommondation."