Pam Nicholson, president and CEO of Enterprise Holdings, has received a Glassdoor Employees’ Choice Award, which recognizes the highest rated CEOs for 2017.

Enterprise Holdings employees voted Nicholson in at No. 21, making her the highest-ranking woman among the 100 chief executives recognized by Glassdoor.

Glassdoor, a job search website, released its annual report this week. When employees submit reviews about their employers on Glassdoor, they are asked to rate various factors about their employment experience. As part of these ratings, employees are also asked to rate whether they approve, disapprove, or are neutral about the performance of their CEO.

A 36-year veteran of Enterprise Holdings, Nicholson started her car rental career in 1981 as part of the Enterprise Management Training Program. Since then, she has served as regional vice president in Southern California, corporate vice president at Enterprise’s headquarters in St. Louis, general manager in New York, and senior vice president of North American Operations in 1999. Nicholson accepted the role of chief operating officer in 2003, appointed president in 2008, and then promoted to chief executive officer in 2013.

Nicholson has been one of Fortune magazine’s Most Powerful Women in Business (MPW) for the past 10 years. Under her leadership, Enterprise Holdings grew its revenue in fiscal year 2016 by more than 8% percent to $20.9 billion and expanded its network to include more than 9,600 fully staffed locations, according to the company.