Cosworth general manager of F1 Mark Gallagher is confident that the four new teams are on target to be on the grid at the start of the 2010 Formula 1 season.
Lotus, Campos Meta, US F1 and Manor Grand Prix will all run Cosworth powerplants next year, and Gallagher is encouraged by the progress the teams are making.
"We are aware of what the teams are doing both technically and financially and we are impressed," Gallagher told AUTOSPORT. "They are doing everything that we would expect of a team at this stage and we have no reason to have any doubts that they will be ready.
"They have all worked hard to fulfil their commitments to Cosworth and on the technical front are behaving in exactly the way you would expect them to. They are asking the right questions and doing a good job of liaising with us on the technical side.
"There are very well-respected people involved in all four teams and they are going about their preparations for next season in the right way.
"All four are professional setups that have impressed us a lot with their approach and you only need to look at what they have achieved in the past few months to realise that these are very serious teams."
Doubts had been raised over the progress being made by the new teams, with US F1 in particular the subject of intense speculation, but Gallagher has no doubt that all four outfits are well-advanced in designing and building their cars for 2010.
Although the new teams have been wary to make too many public comments about their ambitions, all four insist that they will have cars ready to hit the track when pre-season testing kicks off next February.
"We are probably better-placed than anyone to make a judgement on how the teams are doing," added Gallagher. "We are in regular dialogue with all of them and have seen how much progress they have made in recent months.
"There has been a lot of rubbish said about the new teams recently, but nothing we have seen has given us any cause to have any doubts. We're very pleased to be involved with teams that have a very good chance of causing a surprise or two over the course of next year."
As well as supplying the four new teams with 2.4-litre V8, Cosworth will also power Williams next year in a deal revealed two weeks ago.