Sibierski, a free signing from Manchester City in August, is 32 and would relish the chance to extend his top-flight career further.
Sibierski has netted some crucial goals and is one of the big reasons why Newcastle are in the last 32 of the UEFA Cup after crucial strikes against Fenerbahce and Celta Vigo.
Sibierski: "My form hasn't been bad. But I have to say that I have enjoyed my time at the club so much, it has been for me the best time of my career.
"I have to say thank you to my team-mates and my manager for that because I know I have great support from them all - I can feel that everyday.
"It is a great feeling for me.
"I have a one-year deal and I will be out of contract in June. I will have to see what happens. I don't plan anything and I don't take anything for granted.
"I am happy here and every day I will give 100%. I can seriously say I don't know what will happen with the contract. I will see at the end of the season."
"It isn't up to me to talk about contracts. The main thing is winning games for Newcastle United. And that is all I am interested in talking about now. I want to help the club get as far up the table as we can, and the only way to do that is by winning.
"I will see what happens in June."