Most people agree experts require a minimum of 15 years (30,000 hours) of full-time experience to be deemed an expert. We've been providing expert advice for over 25 years, since 1989. Roger Tickner has been a credentialed safety professional (CRSP) since 1984, giving him well over 60,000+ hours of full-time expertise. You know experience matters. So do we. It's what we do.