The National League North club have made their second summer signing with teenage goalkeeper Brad Caswell coming on board.
The 19-year-old impressed for Stafford Rangers last season and Holleran has seen enough to think he is capable of the step up.
The Brakes manager wants the young stopper to keep number one Tony Breeden on his toes.
Two of last season’s side have agreed to stay on as the Leamington squad starts to take shape.
Connor Gudger and James Mace, the two defenders, have put pen to paper.
“Paul Holleran has now secured the majority of his defensive unit from last season, which will provide a further boost as he looks to build a squad capable of consolidating in the Vanarama National League North once more,” confirmed a club statement.