The former chief operations director of GMTV brings with him a wealth of broadcast and other media experience.
Crouch will also continue his consultancy work with the Media Insights Agency that he founded when leaving GMTV in 2010.
Founder, Colin Lisle commented: “We are delighted to have Clive on board as one of our partners. His media expertise especially in the broadcast sector together with the contacts and relationships he has forged in the industry will be a huge benefit to Lisle and the properties we represent."
Crouch, who also writes a monthly comment for ToyNews magazine, added: “Lisle International is a developing agency with enormous energy that is great to be a part of.
"It is my aim to take the years of experience I have had in the media industry and put them to good use in growing Lisle International.”