Former Southampton player Harrison holds UEFA A coaching badge, a minimum requirement for a coach in the CAF interclub.
The former Southampton and Stoke City player has been in Africa having coached 13 clubs Mark has coached mostly in Southern Africa where he handled Township Rollers of Botswana, Baroka FC, Chippa United and Golden Arrows of South Africa.
The Englishman, 60, jetted in last week and has been unveiled to fill up the gap left by Portuguese coach Manuel Vaz Pinto who parted ways with the club recently on mutual consent.
Harrison was at Camp Toyoyo on Saturday last week as Gor Mahia engaged AFC Leopards in a friendly game.
Sammy ‘Pamzo’ Omollo who has been handling the team since the departure of Vaz Pinto will remain as the assistant coach.
Harrison played for Southampton between 1977 and 1979, was at Stoke City between 1982 and 1984, and the two clubs are among eight sides he featured for during his active playing career.
Kariobangi Sharks
Homeboyz
Ulinzi Stars
Mathare United
KCB
Posta Rangers FC
Bandari
APS Bomet
Murang'a SEAL
Gor Mahia
Bidco United
Shabana
Fulham
Newcastle
Liverpool
Brentford
Burnley
Wolves
Chelsea
Tottenham
Bournemouth
Manchester City
Arsenal
Valencia
Barcelona
Celta Vigo
Sevilla
Espanyol
Real Sociedad
Real Betis
Atletico Madrid
Girona
Athletic Club
FAR Rabat
Mamelodi Sundowns
Migori Youth
Kibera Black Stars
Darajani Gogo
Vihiga United FC
Gucha Stars
Luanda Villa
Talanta
Fortune Sacco
Soy United