ACT Brumbies chief executive Michael Jones says they were happy to lose Speight for a possible Super Rugby finals campaign next season to help that bid for gold - a season that will start against the Wellington Hurricanes at Canberra Stadium.

He expects to have the Brumbies list finalised by the end of the week and Fairfax Media believes that will include David Pocock's re-signing plus the announcement of a replacement for France-bound halfback Nic White.

Canberra's Cusack has been part of the sevens program for the past three years and said Speight was an exciting signing - even if it meant some of the long-term members of the squad miss out on their Olympic dream.

The fifth-ranked Australians need to win an Oceania Olympic qualifying tournament at the end of the year to earn a spot at the 2016 Olympic Games in Rio de Janeiro.

Speight won't join the squad until after that and will play three tournaments - Sydney, Hong Kong and London - while also playing at least seven Super Rugby games for the Brumbies.

The Fijian flyer grew up playing the sevens and starred for the Brumbies when they won the World Club Sevens in London in 2013.

Cusack said the Speight effect would be twofold - firstly his pace and power will be a crucial cog in their bid for gold, and secondly he will lift the players around him.

He said the increased competition for places would push the entire squad and raise the profile of the sport.

Cusack said Wallabies five-eighth Quade Cooper, who will focus solely on sevens next year, would "slot in nicely" and "the more the merrier" when it came to high-profile signings.

"With the inclusion of Henry, and maybe a few others, we'll hopefully be able to crack the top three and, come Olympic time, the gold," Cusack said.

"I think [he can make the difference]. To have him as an individual in the program is amazing, but it what it does to the rest of the players that are already full-time will be another thing.

"We're only going to get better and better with the inclusion of Henry and others ... what he has to offer to the game is going to be beneficial in the long run."

Speight was contracted to the Brumbies until the end of 2016, when the Australian Rugby Union came knocking to bring him into the sevens program.

Jones said the fact Speight was able to play at least seven Super Rugby games next season was crucial in the hybrid contract going ahead.

He said the Brumbies wouldn't normally sign a three-year deal, but this was a "win, win, win all round".

Jones supported Speight's bid for gold, but he quashed rumours Brumbies playmaker Matt Toomua would also be joining the sevens program next year.

"We're trying to support the ARU and the Australian sevens win a gold medal," he said.

"We took the long-game view [of locking Speight in until 2018] and also it provides an opportunity for some of the other guys to get more game time and  ... we've pretty much locked up the squad for next year, Pocock is the only one we've got to finalise."

Jones said he was excited about next season.

They'll have eight home games, including an Anzac clash against the Canterbury Crusaders at Canberra Stadium and the new Japan side, but Jones was unsure how many of those will be afternoon games.

The Brumbies will also play the Cape Town Stormers and the Free State Cheetahs on their South Africa tour.

"We're just liking the draw. Some teams you look at it and go, 'That's a tough gig' - a lot of travelling back-to-back - and we just lucked out this this," Jones said.

"So I'm expecting next year we're going to get a tough one."