"What we have got is small numbers, but we have a lot of quality within those small numbers," Cattermole told the Shields Gazette.
"If we can add three, four or five new players that are competing for places then that would be great.
"It is obvious we need players, the season is too long and demanding to go into the season with the numbers we have got."
"I'm sure we will be adding to the squad. But the players we have got, if you look at the starting XI, then there is competition for places," he added.
"The season starts in two weeks and I think they are going to have to be good players to come straight into the team.
"There is no panic for the start. After two or three months, we will need players ready and if we can add some quality with the numbers then that would be great.
"I'm sure the club is working on that."