Jenkins has helped nurture Wales and Lions fly-half Stephen Jones, plus Wales' Rhys Priestland and Dan Biggar.
Halfpenny, with 294 points from 44 Wales appearances, is grateful for Jenkins' guidance, saying: "For me, Jenks has been huge since he picked me up in the academy and I have come right through with him to senior level.
"He has been massive in terms of my preparation for every game. He was the best [goal-kicker] in the world in his day, and I couldn't think of anyone better to have, bringing on the tee for me and giving me little pointers just before the kick and things. He's huge for me in that regard.
"He has just been massive for me in terms of my progression through the years and preparing me mentally and technically."
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