Public Broadcasting Service President and CEO Pat Mitchell was named president and CEO of the Museum of Television & Radio on Wednesday by museum board Chairman Frank A. Bennack Jr.

Ms. Mitchell’s appointment, which takes effect in March, will fill a void left by the abrupt departure last June by Stuart Brotman after only 14 months in the role. Ms. Mitchell said last year that she planned to leave PBS, which she took over in 2000.

Mr. Bennack also named Christy Carpenter to the newly created position of executive VP and chief operating officer, effective immediately. Ms. Carpenter previously was executive director for the MT&R Media Center and International Council.

“The board is confident that Pat, Christy and the very capable staff of the museum will be an effective team to increase the museum’s impact at a time of rapid change in the media world,” Mr. Bennack said in his announcement.

Ms. Carpenter has for six years been a member of the board of the Corporation for Public Broadcasting, a role in which she got to know Ms. Mitchell. “Pat has the dynamism, energy, and strategic mind-set to lead the museum through this time of explosive technological growth in the media industry,” Ms. Carpenter said in a statement included in Wednesday’s announcement.

The award-winning Ms. Mitchell was a network newswoman, independent producer and executive producer of original projects for Ted Turner’s cable networks before she took over PBS.

Ms. Carpenter trained to be a lawyer, helped explore interactive services in the early 1980s, is a veteran of the federal government and the public relations world and joined the board of public broadcasting station KCET-TV in Los Angeles in 2002.

There was no immediate comment from PBS.