The sentence is correct and usable in written English. You can use it whenever you want to express that someone has left a job or position at a company. For example: After five years at the company, John announced that he has resigned his position as CEO.
Mr. Strauss-Kahn, who denies the charges, has resigned his position at the fund.
In the statement, museum spokesperson Anne Canty wrote that "Brian Richmond has resigned his position as curator at the American Museum of Natural History, effective 31 December 2016.
Censullo has resigned his position with Micron.
He resigned his position at the tabernacle on medical advice in January 1914, and intended to resign his parliamentary seat.
He resigned his position at M.I.T. to work full time at the company in 1947.
Much of the questioning on that occasion focused on James Murdoch, then overall head of the family's newspaper interests in Britain, a position he has resigned as his star in the company his father founded has waned precipitously with every new revelation of wrongdoing at the tabloids.
In July 2011, he resigned his position at Harvard.
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Cristina Valenza
Retail Lead Linguist @ Apple Inc.