Adrian Sutil says that switching to Sauber is a 'refreshing change' after almost eight years with Force India.
Sutil joined Force India under a previous guise, Midland, in 2006 and graduated to a race seat when Spyker took over the team in 2007.
The German remained with the squad when it developed into Force India and only missed out on a race seat in 2012.
"It's a refreshing change. I had a good time with Force India for many years," he said at AUTOSPORT International in Birmingham.
"I started in 2006 as a test driver when it was the Midland team. The car was 3s off the pace, and always second to last or last.
"We brought the car up to the front, and sometimes almost on the podium. I was on the front row at Monza and had fastest lap in 2009, and my team-mate [Giancarlo] Fisichella was on the podium at Spa. We had good results and a very good time.
"I felt it was time for a change for me. New team, new regulations, new car and it's very close to home - just a one-hour drive from where I am in Switzerland. I can speak German there, and use my time more efficiently."
Sutil believes that if Sauber can continue their form into 2014, he would be fairly satisfied.
"I hope to start the season as Sauber finished it, that would already be quite a good success."
"Force India and Sauber have been fighting against each other for quite a few years. Last year Force India started strong, it finished a bit more difficult and it was hard to get into the top 10, whereas Sauber was very strong at the end, so let's see. From my point of view, hopefully Sauber will be in front of Force India this year."