The former Kendall Tarrant chief executive stepped down from the board of the company's Hat Pin parent in May and departed the headhunters in August.
Up until a week ago, Jay Haines also worked at Kendall Tarrant as an executive search consultant and account manager. However, it is understood that he is contractually bound from setting up a rival headhunting venture until the end of February 2007.
Gay Haines' departure followed the news in March that Kendall Tarrant was to merge with Stolkin + Partners in a deal that was worth more than £1 million. At that time, it was announced she would become Kendall Tarrant's worldwide chairman with an "ambassadorial" role.
It is understood Jay Haines will front the new venture, with his mother taking on the chairman's role.
Gay Haines was unavailable for comment. Jay Haines declined to comment.
Comment, page 48.