(Reuters) - U.S. President-elect Donald Trump announced two additional nominees for his Cabinet on Wednesday, and his transition team said he is holding meetings as he prepares to make high-level appointments. Below are people mentioned as contenders for senior roles as the Trump works to form his administration before taking office on Jan. 20, according to Reuters sources and media reports. See the end of list for posts already filled. * Mitt Romney, 2012 Republican presidential nominee and former Massachusetts governor  * Rudy Giuliani, Republican former mayor of New York City * David Petraeus, retired U.S. general and former CIA director who pleaded guilty to mishandling classified information he gave to his mistress * Bob Corker, Republican U.S. senator from Tennessee and chairman of the Senate Foreign Relations Committee * James Mattis, retired Marine Corps general * David Petraeus, retired U.S. general and former CIA director who pleaded guilty to mishandling classified information he gave to his mistress * Tom Cotton, Republican U.S. senator from Arkansas       * Jon Kyl, former Republican U.S. senator from Arizona * Duncan Hunter, Republican U.S. representative from California and early Trump supporter, member of the House Armed Services Committee * Jim Talent, former Republican U.S. senator from Missouri who was on the Senate Armed Services Committee  * Rick Perry, former Republican Texas governor * Stephen Hadley, former national security adviser under President George W. Bush * Michael McCaul, Republican U.S. representative from Texas and chairman of the House Homeland Security Committee * General John Kelly, retired Marine Corps general and former commander of U.S. Southern Command * David Clarke, Milwaukee County sheriff and vocal Trump supporter * Joe Arpaio, outgoing Maricopa County, Arizona, sheriff who campaigned for Trump * Kris Kobach, Kansas secretary of state * Frances Townsend, homeland security and counterterrorism adviser to Republican former President George W. Bush * Jeff Holmstead, energy lawyer, former EPA official during George W. Bush administration * Robert Grady, venture capitalist, partner in private equity firm Gryphon Investors  * Leslie Rutledge, Republican Arkansas attorney general * Carol Comer, commissioner of the Indiana Department of Environmental Management * Scott Pruitt, Republican Oklahoma attorney general * Harold Hamm, Oklahoma oil and gas mogul, chief executive of Continental Resources Inc * Kevin Cramer, Republican U.S. representative from North Dakota * Robert Grady, venture capitalist, partner in private equity firm Gryphon Investors  * Larry Nichols, co-founder of Devon Energy Corp * James Connaughton, chief executive of Nautilus Data Technologies and a former environmental adviser to President George W. Bush * Rick Perry, former Republican Texas governor * Sarah Palin, former Alaska governor, 2008 Republican vice presidential nominee * Jan Brewer, Republican former Arizona governor * Forrest Lucas, founder of oil products company Lucas Oil * Harold Hamm, Oklahoma oil and gas mogul, chief executive of Continental Resources Inc * Robert Grady, venture capitalist, partner in private equity firm Gryphon Investors * Mary Fallin, Republican Oklahoma governor * Ray Washburne, chief executive of investment company Charter Holdings * Cathy McMorris Rodgers, U.S. representative from Washington state and House Republican Conference chair * U.S. Navy Admiral Mike Rogers, director of the National Security Agency * Ronald Burgess, retired U.S. Army lieutenant general and former Defense Intelligence Agency chief  * Robert Cardillo, director of the National Geospatial-Intelligence Agency * Pete Hoekstra, Republican former U.S. representative from Michigan * Rudy Giuliani, Republican former mayor of New York City  * Dan DiMicco, former chief executive of steel producer Nucor Corp * Andrew Puzder, chief executive officer of CKE Restaurants * Victoria Lipnic, U.S. Equal Employment Opportunity Commission member and former Labor Department official during the George W. Bush administration * Dr. Ben Carson, former 2016 Republican presidential candidate and retired neurosurgeon * Goldman Sachs Group Inc President Gary Cohn * Sarah Palin, 2008 Republican vice presidential candidate and former Alaska governor The Trump transition team confirmed he would choose from a list of 21 names he drew up during his campaign, including Republican U.S. Senator Mike Lee of Utah and William Pryor, a federal judge with the 11th U.S. Circuit Court of Appeals.  * Republican National Committee Chairman Reince Priebus * Steve Bannon, former head of the conservative website Breitbart News * Jeff Sessions, Republican U.S. senator from Alabama and senior member of the Senate Judiciary Committee (subject to Senate confirmation) * Republican U.S. Representative Mike Pompeo from Kansas (subject to Senate confirmation) * Michael Flynn, retired Army lieutenant general and former director of the Defense Intelligence Agency * Nikki Haley, Republican South Carolina governor (subject to Senate confirmation) * Betsy DeVos, Republican donor and former chair of the Michigan Republican Party  * Tom Price, Republican U.S. representative from Georgia,  orthopedic surgeon * Elaine Chao, former labor secretary and deputy transportation secretary under Republican Presidents George W. Bush and George H.W. Bush, respectively. Chao is married to  Senate Majority Leader Mitch McConnell * Steven Mnuchin, former Goldman Sachs Group Inc executive and Trump’s campaign finance chairman * Wilbur Ross, billionaire investor, chairman of Invesco Ltd subsidiary WL Ross & Co 