Hartlepool manager Ronnie Moore says wholesale recruitment is needed to strengthen the squad for the forthcoming 2015-16 season.
Moore kept the club in League Two following his appointment in December.
Pools released six players at the end of the campaign - Jack Compton, Marlon Harewood, Darren Holden, Jonny Maxted, Tommy Miller and Stuart Parnaby.
"We need players in all positions, from goalkeeper up to the strikers," Moore, 62, told BBC Tees.
"There's a lot of hard work to be done this summer."
The club exercised the option of extending the contracts of Michael Duckworth, Nicky Featherstone, Scott Fenwick, Lewis Hawkins, Dan Jones, Josh Nearney and Michael Woods, as they were to expire this summer.
Loanees Aaron Tshibola, Jordan Hugill, Jordan Jones and David Mirfin have all returned to their parent clubs having played their part in Hartlepool retaining their Football League status.
Matthew Bates, Jonathan Franks and Neil Austin are three of the players pondering offers to remain at Victoria Park.
"We've given offers to one or two," Moore said. "They'll have to weigh up their options, and decide what they want to do. I can't really say what way it's going to go."
While Moore has outlined a number of areas needed to strengthen this summer, finding the right characters will be important for a side involved in battles against relegation in each of their last three campaigns.
"We need some leaders who know the game," Moore added. "Players who are vocal - we're a very quiet side - we need some experience and lads who are winners and who will guide us to the right end of the table."