In total, nine people were charged with a range of counts including fraud, conspiracy and corruption.
The charges are in connection with alleged bribes used to secure the MUHC contract for a consortium including SNC-Lavalin.
Today's preliminary hearing will cover seven of the accused, including former SNC executives Pierre Duhaime and Riadh Ben Aissa.
The former head of the MUHC Arthur Porter is also facing charges but is fighting his extradition from Panama.
The case involves $22.5 million in bribes allegedly paid to SNC-Lavalin International and funnelled through shell companies to Porter and his wife, Pamela Porter.
SNC-Lavalin and the Quebec government are both seeking to recover money allegedly paid out in the bribery scheme.