08/12/2013 08:32 am ET Updated Oct 12, 2013

ProPublica Staffs Up With Three New Hires

ProPublica, a non-profit investigative news organization, has hired three reporters to cover the environment and energy, sex and gender, and the military.

Sports Illustrated senior writer David Epstein will cover energy and the environment for ProPublica, along with continuing to write on sports and sports science. Epstein is the author of the recently published book, "The Sports Gene," and was co-author SI's 2009 cover story revealing embattled Yankee Alex Rodriguez had tested positive for steroids six years earlier.

Epstein will be joined at ProPublica by Nina Martin and Megan McCloskey, two additional hires expected to be announced Monday.

Martin has spent three decades covering women's legal and health issues at publications such as San Francisco magazine, The Washington Post, and Baltimore Sun. She'll focus on sex and gender issues, a beat that ProPublica previously didn't have full-time reporter covering. The new position is supported by a Ford Foundation grant.

Similarly, McCloskey will be the news organization's first full-time military and defense reporter. She joins from Star and Stripes, where she's been a correspondent since 2009 and has reported from Iraq and Afghanistan.

ProPublica, which was the first online news outlet to win a Pulitzer Prize and just celebrated its fifth birthday, now employs 41 full-time journalists.