Having been relegated from the Premier League in 2018, Swansea made the Championship play-offs in 2020 and 2021.
Since then, they have had finishes of 15th, 10th and 14th in the second tier.
Sheehan believes Swansea’s next managerial appointment must be part of a rebuilding process if the club are to re-establish themselves as promotion contenders.
“Get it right, that’s all I would say,” the former Luton and Southampton coach added.
“Let’s do it right now and however that looks, whoever it is, the club has got to start building to be successful, to start laying foundations for where it should be and where it needs to be, because there are a good few levels in the Championship.
“It’s important you get to a place where you are a top-10 team, then a play-off-challenging team, because then you have a couple of teams like last year and this year who are potentially in a league of their own.
“That’s where we need to go and as long as we are on the same page, everything is good.”
