The first woman to hold the office of fire chief in Prince George’s County was sworn in Tuesday.

Tiffany Green took office after she was unanimously confirmed by members of the Prince George’s County Council.

Green, who is among about 70 female fire chiefs out of more than 29,000 around the country, previously served as a deputy to former chief Benjamin M. Barksdale, who retired last year. She joined the department in 1999.

At an inauguration ceremony at First Baptist Church of Glenarden, Green, 44, said the idea of a female fire chief was “thought to be impossible” when she started her career.

“I will endeavor as your fire chief to rewrite the narrative,” she said.

At the ceremony, Prince George’s County Executive Angela D. Alsobrooks (D) said Green was ranked “number one in every single promotional test she has ever taken in this department” and should inspire the county’s young women.

“It takes many years to become an overnight success,” she said. “Her grit, determination and achievement show that this was no quick and easy process.”