"impeccable career" is correct and usable in written English.
You can use it to describe someone's career or to refer to a job that you have done very well. Example: My boss has had an impeccable career in the banking industry, rising through the ranks to become a senior executive.
Mr. Siegle declined to discuss the case but called Detective Collins a "good detective" who has had "an impeccable career" with the Police Department.
Thomas's Lightning counterpart, Dwayne Roloson, has an impeccable career record in elimination games — he has been the winning goalie in all seven he has played.
Ilia has built an impeccable career and we're confident that she'll have a brilliant future," says Daniel Coronell, President of Univision News.
"Fifty-six years of an impeccable career... this year we say goodbye to him like we do to a great master, on our feet and clapping.
"This is a witch hunt against a man who has had an impeccable career for over 30 years and has always been known as a man of high character".
His hormones have produced children rather than political embarrassment, and he has impeccable careers in the army and the City behind him.
Announcing his retirement, City of London police praised Greany for his "impeccable policing career".
Last year, as age might have started catching up on him, he gathered 597 impeccable disposals – a career-best tally.
With Saturn dominant, your new year resolution is: impeccable dedication to your career.
"He was a huge figure at Madrid and with Spain, his career is impeccable, we respected him enormously and he got us to the edge of the play-offs.
Such accusations represent an unlikely turn of events for a 68-year-old professional with an impeccable record and a career more behind him than in front of him.
