This sentence is wrong, this involves the results complement problem. cha bu duo shi nian" is the "results" complement “gong zuo” So here we can only say "gong zuo cha bu duo shi nian le" as we say "cha gan jing le" rather than "cha le.gan jing. So it should be said that this sentence:wo zai zhe jia gong si gong zuo cha bu duo shi nian le .or:“wo zai zhe jia gong si gong zuo le cha bu duo.shi nian”