From NBC's Savannah Guthrie
Obama will name Steven Chu his choice for Energy secretary, Lisa Jackson for EPA administrator and Carol Browner as energy "czar" reporting to the president.
It is unclear whether the Browner position is cabinet level.
This will not be officially announced this week.
There will be a news conference tomorrow to announce the Health and Human Services secretary -- expected to be Tom Daschle.
*** UPDATE *** Msnbc.com's Alan Boyle wrote last year about how biology might help fill fuel tanks, and the story included some of Chu's thinking on energy policy.