The Securities and Exchange Commission (SEC) announced the appointments of Natasha Vij Greiner and Keith Cassidy as interim acting co-directors of the Division of Examinations.

They will oversee the division while Director Richard Best is on extended medical leave, the SEC said in a press release Tuesday.

“My thoughts are with [Best] as he’s away from the agency on medical leave,” said SEC Chair Gary Gensler in the release. “I thank [Greiner] and [Cassidy] for stepping in on an interim basis to lead the Division of Examinations. They are both strong leaders who have earned the respect of their colleagues throughout the agency.”