Obama plans to name the four to the posts in the coming weeks, barring unforeseen developments.
Still unclear is whom Obama will tap for interior secretary.
Officials close to the transition said support for John Berry, the director of the National Zoo and a former assistant secretary at the Interior Department, was growing. But these officials also said Arizona Rep. Raul Grijalva and California Rep. Mike Thompson were still in the running.
The Democratic officials who disclosed the selections spoke on the condition of anonymity because they were not authorized to reveal names that have not been made public.
Among these posts, Browner's stands out because it's a new White House position.
She is expected to coordinate the various agencies that play a role in energy and environmental policy, especially on issues such as climate change that don't fit nicely in the silos of the federal government. Those agencies could include the EPA and the Transportation, Energy and Interior departments.
Six weeks before his Jan. 20 inauguration and little more than a month since his election, Obama has chosen much of his Cabinet and top White House staff. He has only a few key posts left to fill: national intelligence director, the secretaries of housing, labor, education, transportation and agriculture and the U.S. trade representative.
Obama scheduled a news conference on Thursday in Chicago to name former Senate Democratic leader Tom Daschle as his secretary of health and human services. That choice has been known for some time.
On Wednesday, Michigan Gov. Jennifer Granholm, who has been mentioned as a possible labor secretary, was in Washington meeting with Obama's transition team. Her spokeswoman, Liz Boyd, would say only that the governor discussed the president-elect's economic stimulus plan.
As for his environment and natural resources team:
- Chu was one of three scientists who shared the Nobel Prize for physics in 1997 for work in cooling and trapping atoms with laser light. He's a professor of physics and molecular and cell biology at the University of California, Berkeley, and has been the director of the Lawrence Berkeley National Laboratory since 2004, where he has pushed for research into alternative energy as a way to combat global warming. It is the oldest of the Energy Department's national laboratories, doing only unclassified work, and in recent years under Chu has been at the center of research into biofuels and solar technologies.
- Jackson, who would be the first black person to lead the EPA, is a former New Jersey Department of Environmental Protection commissioner who worked at the federal agency for 16 years, including under Browner when she was Bill Clinton's EPA chief. Jackson is a co-chairman of Obama's EPA transition team, and currently serves as chief of staff to New Jersey Gov. Jon S. Corzine. A New Orleans native, she grew up in the Lower Ninth Ward, the area stricken by Hurricane Katrina. She holds chemical engineering degrees from Tulane University and Princeton University.
- Browner, who served as EPA chief for eight years under Clinton, will become Obama's go-to person in the White House overseeing energy issues, an area expected to include the environment and climate matters. Now chair of the National Audubon Society and on the boards of several other environmental groups, Browner has been leading the Obama transition's working group on energy and environment.
- Sutley, the deputy mayor for energy and environment in Los Angeles and the mayor's representative on the Board of Directors for the Metropolitan Water District of Southern California, is the first prominent gay to earn a senior role in Obama's new administration. She was an EPA official during the Clinton administration, including being a special assistant to the EPA administrator in Washington. She also previously served on the California State Water Resources Control Board and was an energy adviser to former Gov. Gray Davis.
Associated Press writers Josef Hebert contributed to this report.