Four deals, known as Lots 1 to 4 and worth a combined £150 million, were awarded earlier this year with Balfour Beatty picking up a brace of wins with the remainder going to Skanska and Nuttall.
Now bidders for Lots 5 and 6 have been revealed by the Olympic Delivery authority and Northern Ireland contractor Lagan is the name that stands out on the list.
The firm, which is based in Belfast, is one of six chasing the Wetland Area Bridges deal which involves building three footbridge in the north of the park to straddle the river Lea.
Lining up with Lagan on this deal, known as Lot 5, are Costain, Nuttall, Sisk, Norwest Holst and Skanska. This contract is due to be awarded this autumn with work due to start in early 2009.
And Lagan is up against four others on the Lot 6, which involves build a footbridge with a span of 30m.
Known as the Central Park Bridge, the structure will be turned into two footbridges in legacy mode.
Media centre builder Carillion has also made the list while Costain, Nuttall, Sisk all surface again. This is due to be awarded at the end of this year with starting on site by the middle of 2009.