In 1985 he created his first infomercial after identifying an opportunity to fill late night and early morningdead air time on cable networks. While companies like Vitamix had been producing infomercial programs for TV broadcasters since 1949, Harrington's model of replacing time that the broadcaster was normally off the air with entertaining and informative advertising launched the modern infomercial format. As President of National Media he oversaw the launch of several successful infomercials himself. After leaving National Media in 1994, he formed a "joint venture company with The Home Shopping Network" and "co-founded HSN Direct International Inc. and served as its Chief Executive Officer and President" between 1994 and 1998. In 2002, he became the President of Harrington Business Development Inc. and the Chairman of On TV, Inc. That same year, he became the Vice Chairman and Director of Thane International Inc. and the Director of Reliant International Inc., leaving both positions in 2003. In 2004, Harrington became the Chairman of Reliant Interactive Media Corp. and the CEO of ResponzeTV America, LLC. Harrington was the Director of Infusion Brands International, Inc. from 2006 to 2008. In 2007, he became the Chief Executive Officer of ResponzeTV Plc and the Executive Director of ResponzeTV Plc, leaving both positions in 2008. Harrington was one of the original panel members and investors on the ABCTV seriesShark Tank from its inception in 2009. He left in 2011 after two seasons of the show. Harrington published his book, Act Now: How I Turn Ideas into Million-Dollar Products in 2009. In 2010, Harrington became a Member of Advisory Board at AbsolutelyNew, Inc. and the Chairman and Senior Executive Officer of H & H Imports Inc. In 2013, he teamed with Cherif Medawar through efreedom.com and together they laid out a plan to equip up-and-coming innovators and business owners with the tools and methods to become Sharks themselves. He served as CEO of the Internet company TVGoods and Senior Executive Officer and Chairman of the Board of Directors for the company called As Seen On TV, Inc. Harrington has been the Director of Harrington Business Development Inc., since 2002. He is an ex officio of the Electronic Retailing Association, Founders Circle. Kevin Harrington became the company spokesperson for InventHelp in April 2013.
