May's programme, 'Be The Best You Can Be. Everyday', offers training and mentoring for all professions.
May said: "Meeting the guys from Thirteen in Twickenham energised me as to all the possibilities of ‘post-rugby’ life. I’m looking forward to working with the next generation of business leaders to share my experiences through my training programme."
Andrew Baiden, CEO of Thirteen Communications, said: "Tom spent 17 years at the top of a sport that was going through unprecedented change. That type of longevity is a testament to his talent, adaptability, passion and attitude. We look forward to working with Tom to take his unrivalled sporting experience and applying it to business environments."
Staff at Thirteen have previously handled PR for British Lions Rugby.