'during my tenure' is correct and usable in written English. It is used to refer to the period of time that someone is in a particular position or job. For example: During my tenure as CEO of the company, I grew profits by 40%.
"I'm frankly ashamed of how poorly we've dealt with this issue during my tenure as CEO.
"However, I am truly sorry that some were disappointed during my tenure as coach," she said.
Mr. Saleh also asked the nation's "pardon for any failure that occurred during my tenure".
"Thomas always looked at me during my tenure as kind of an idea guy," Achatz says.
"Nassau University Medical Center has gone through a historic chapter during my tenure".
"There will be nothing called the Muslim Brotherhood during my tenure," says the former field marshal".
"I am proud of the record of accomplishment during my tenure," Ms. Rehnquist wrote.
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Claudia Letizia
Head Translator and Proofreader @ organictranslations.eu