Sirotkin, who turn 18 later this month, currently contests the Formula Renault 3.5 series where, despite claiming a podium finish, his results have hardly suggested the presence of an F1 star-in-the-making.
Without a Super Licence, Sirotkin will be unable to take part in any Friday practice sessions but Kaltenborn insisted Sauber can get him mileage. He needs 300km and the only option available to them will be at pre-season testing early next year.
The Team Principal cited Sauber's experience in blooding young, inexperienced drivers. In recent years both Sergio Perez and current driver Esteban Gutierrez made their F1 debuts with the Swiss team, as have Felipe Massa and Kimi Raikkonen in the past.
Famously, Raikkonen made a similar jump to the one Sauber hope Sirotkin will make. The Finn had contested only 23 car races up until that point but was 21 at the time and had shown far more potential.
"We know what responsibility we have. We've been in similar situations before, maybe not with such a young driver but with drivers who have come from the series he's in now," Kaltenborn said at the Hungarian GP.
"We take that responsibility very seriously and we will definitely - like in the past - do our best to prepare him.
"I think we really have to take it step-by-step and nobody needs to fear that we're going to harm anybody involved with this."
Sirotkin comes as part of a package Sauber announced two weeks ago which sees them backed by three Russian agencies in what Kaltenborn described as a "long-term deal".
His father heads up the National Institute of Aviation Technologies which, along with the Investment Cooperation International Fund and the State Fund of Development of North-West Russian Federation, will apparently work with three ends in mind.
Kalternborn explained: "There are three pillars to it. One is focus on the technological co-operation, so both sides will bring in their technology know-how and see what we can develop.
"People are probably not aware of what sort of technologies and know-how are in Russia at the moment.
"That's the major part. The second part is preparing the driver Sergey Sirotkin to come into Formula 1. At this stage we're setting up a programme.
"The third aspect is to assist where we can as a team to establish Formula 1 there because we all know that next year the race is coming up."
The inaugural Russian GP has yet to be officially confirmed on the 2014 calendar but its existence is still one of the more certain aspects of the arrangement.
Sirotkin's capabilities aside, Sauber are having to fight the common perception that the deal, if not too good to be true, is, to say the least, shady.
All three agencies have links to the Russian government which, by the sounds of it, is keen to promote the country through both its technology and the race.
Kaltenborn couldn't say when Russian know-how might be incorporated into a Sauber car and the caginess continued when she refused point-blank to reveal whether their new partners had actually handed over any money yet.
She did confirm that the team ownership is not going to change - Kaltenborn holds a 33 per cent stake with founder Peter Sauber holding the rest - and also said they had considered other options.
Yet while the detail remains sketchy, the relief was obvious. Sauber have struggled to pay suppliers and team personnel this season, although Kaltenborn denied that their future had been in doubt.
"We've gone through tough times before and we know we can survive. The question is not whether you want to survive, it's whether you want to, at some point in time, make the step ahead," she said.
"We knew that if this deal came through, we'd have the basis in the long term to make our way up again - and that's what's going to happen now."
And what of the cynics who don't think it'll happen? "I certainly have no reasons to believe that. I don't know why they think that. Maybe you need to ask them why they have that opinion," came the response.
"We know what we're talking about and we have good reasons to believe in it."
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