Before the 2013 Season Jamahl followed Nathan Brown to St Helens RLFC as an Assistant coach where he will work alongside Keiron Cunningham.
At the end of the fourteenth season of Super League there were five internationals who had played in every season; these being Keiron Cunningham, Sean Long, Paul Johnson, Keith Senior, Terry Newton and they were joined in this achievement by Jon Wells.
After the sacking of Royce Simmons in 2012 he was appointed assistant head coach of St Helens, working alongside temporary head coach Mike Rush.
Merce Cunningham | Michael Cunningham | Allan Cunningham | Randall Cunningham | Allan Cunningham (botanist) | Sean S. Cunningham | Chris Cunningham | Ward Cunningham | Imogen Cunningham | Bill Cunningham (talk show host) | Bill Cunningham | Keiron Cunningham | Johnny Cunningham | Billy Cunningham | Alexander Cunningham | Steve Cunningham | Roseanna Cunningham | Richie Cunningham | Richard Cunningham McCormick | Ken "KG" Cunningham | Ken Cunningham | Jeff Cunningham | Dianne Cunningham | Cunningham | Steph Cunningham | Séamus Cunningham | Peter "Sugarfoot" Cunningham | Peter Miller Cunningham | J. V. Cunningham | John Cunningham |