Former Hearts captain Danny Wilson is on the verge of completing his return to Rangers, while Wigan defender Rob Kiernan has also arrived in Glasgow.
Wilson is currently undergoing his medical at Murray Park as Mark Warburton looks to complete his first signings as Rangers manager.
Wilson started his career at Rangers before earning a move to Liverpool as an 18-year-old. The defender then spent spells on loan at Blackpool and Bristol City before moving to the Jambos on loan.
After a successful loan spell at Tynecastle, Wilson joined Hearts on a permanent deal where he was appointed captain and led the club to the Championship title.
However, Wilson activated a get-out clause in his contract and is now set to return to Rangers.
Wigan Athletic defender Kiernan has also arrived at Murray Park ahead of completing his move from the recently relegated English club.
Kiernan, who has already experienced action in Scotland following a loan spell at Kilmarnock from previous club Watford back in 2010, made 18 appearances for Wigan last year before being sent out on loan to Birmingham for the last three months of the campaign.
Kiernan is well known to Warburton, who he worked with at Brentford during another loan spell two years ago.
Warburton also coached the player when he was his youth academy boss at Watford.