Pat Sullivan is recognized as a pioneer in the high-tech industry who co-created the contact manager ACT! along with his partner Mike Muhney. Sullivan was named as one of the "80 Most Influential People in Sales and Marketing History" in 1998 by the magazine Sales & Marketing Management  among the ranks of Henry Ford, Walt Disney, Jack Welch, Donald Trump, and Bill Gates.
Pat Sullivan started Contact Software in Dallas, Texas in 1986. With his friend Mike Muhney and two programmers, Randy Haben and John Maurer, the team developed the first commercial version of the contact manager ACT!. In 1993, ACT! was acquired by Symantec. In 1995, Pat Sullivan founded the sales force automation company SalesLogix. In 1999, SalesLogix Corp was renamed to Interact Commerce Corporation and ACT! was reacquired from Symantec. In May 2001, Sage Group plc acquired Interact Commerce Corporation .
In 2005, Pat Sullivan launched Jigsaw Health and published the book Wellness piece by piece in an effort to help the 125 million Americans suffering from chronic health conditions.
In 2011, Pat founded his latest tech venture, Contatta. Contatta is productivity software that combines multiple business tools like email, social, collaboration, project management, task management and contact management in a single cloud-based solution.