The Sky Blues officially announced Lavicka would take the reins from John Kosmina, sacked after failing to lift the club to the play-offs, but admitted there was no guarantee the 45-year-old was here for the long haul.

Lavicka and coaching partner Michal Zach have given themselves a year to decide whether they want to remain in Australian football.

"We are looking at this as a long-term solution (but) we have to respect the fact that - coming from the Czech Republic - living over here is a lot different to living in Europe," Kamasz said.

"We respect the fact that they are going to have to change where they live and they may have their views about Sydney.

"We want them to stay and there are options beyond the one year. We believe they will be here longer than one year."

Kamasz is adamant the move to axe Kosmina and install Lavicka, instigated by the club's new owners, was the right one if they Sky Blues are to achieve stability.

And he predicted further change once new club boss - Russian businessman David Traktovenko - officially took control next month.

"There is a concern about instability in the club," Kamasz said. "The difference with this (Lavicka's appointment) is that we have a new ownership structure from the 1st of March and this is one of the major changes the new owners believe was needed

"They are in the process of articulating their vision and there are going to be a lot of changes happening at this club and this is one of them.

"We need stability and we believe we've brought in the right coaches and that the stability will be there from that point of view.

"But we still need unity of purpose in this club. There has been a lot of discussion that there is an unhealthy dressing-room and I think we needed to make some changes and the changes have been made and I think you'll find the stability will come."

Although conceding Lavicka's grasp of English was 'basic' but there was no problem with his 'football English', Kamasz hailed the former Sparta Prague coach's signing as a momentous occasion in Sydney's history.

"He's got a tremendous pedigree. He holds the highest coaching licence in UEFA," Kamasz pointed out.

"We believe we are in for a very successful 2009-2010 season. It's (been) a question of affordability (in the past) and we now have more funds to bring in two outstanding coaches."

Kamasz confirmed marquee signing John Aloisi has a future at Sydney FC under Lavicka despite the former Socceroo striker's futile 2008/9 campaign, which yielded just one goal from open play.