Lee Darnbrough will start work on 1 December as the Clarets honour a deal agreed at the request of the ex-manager Eddie Howe before he opted to return to Bournemouth.
Dyche has only been in his post for two weeks and with the January transfer window fast approaching could have cause for concern over his influence on choosing new players.
But joint chairman Mike Garlick said: "We've got someone coming in who will be heading up our recruitment function for players.
"I think Sean has been used to that sort of structure at Watford and at other clubs he has been at. Ultimately he will be the guy who chooses the players that come in."
Dyche's immediate focus will be to hold on to rising stars such as Charlie Austin and Kieran Trippier, as well as inheriting players he didn't personally sign.
Jamaican winger Dane Richards will arrive in January from the Vancouver Whitecaps after securing a pre-contract in August.
Garlick added: "The first thing Sean has to do is have a good look at what he's got. If you look at managers in the past, mistakes were often made when they come in and try to change things too quickly and bring people in too quickly.
"So at this stage it's have a look at what we've got, see how we can improve that and take it from there."