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Who is Rex Tillerson, the ExxonMobil chairman who may become secretary of state?

President-elect Donald Trump has picked Rex Tillerson as his nominee for secretary of state. Here's what you need to know about Tillerson. (Video: Thomas Johnson, Victoria Walker, Danielle Kunitz/The Washington Post)

President-elect Trump's nominee for secretary of state, Rex Tillerson, faces his first day of confirmation hearings Wednesday. Here's the background we reported last month, when the outsider pick was first announced.

To this point, President-elect Donald Trump's Cabinet picks have mostly been either business executives/the wealthy or retired generals. In that context, it's probably not a surprise that Trump selected ExxonMobil chief executive Rex Tillerson as secretary of state, elevating a dark-horse prospect past seasoned political actors like Mitt Romney and Sen. Bob Corker (R-Tenn.) in the stretch.

Tillerson's hardly an unknown character on the world stage, but he's probably not too familiar to Americans. As such, we've put together a brief profile of the man who may soon be in charge of the United States' international diplomacy, assuming he is confirmed.

Tillerson has no experience in the public sector, a first in modern history for a potential secretary of state. Tillerson, 64, joined ExxonMobil in 1975, after receiving a civil engineering degree from the University of Texas. He worked his way up through the ranks, beginning as a production engineer and becoming chairman and chief executive in 2006.

Over his decades at the company, Tillerson's work took him all over the world, including to Yemen and Russia. That, along with his experience as CEO, apparently provides the basis of his familiarity with international diplomacy.

On Twitter, a former ExxonMobil employee who is now at Brookings Institution defended Tillerson's experience. “Oil folks know stuff: anyone who manages multibillion dollar, multi-decade projects needs deep, nuanced understanding of political context,” Suzanne Maloney wrote on Twitter. “… Tillerson rose to top of a company that prizes technical excellence, rock-solid financials, hard work and integrity. State could do a lot worse.”

Tillerson received the Order of Friendship from Russian President Vladimir Putin in 2013. Tillerson's work with ExxonMobil included a stretch working for Exxon Neftegas Ltd., putting him in charge of the subsidiary's fields in Russia and the Caspian Sea.

Two years before receiving the award, ExxonMobil won a contract to explore for oil in a Russia-controlled portion of the Arctic Ocean, which was made more economically viable for drilling in part thanks to the sea ice decline that's followed global warming. Putin himself announced the deal at a meeting in Sochi (where the Winter Olympics would be held the next year).

Several senators have expressed concerns about this relationship, including Sen. Marco Rubio, who sits on the Senate Foreign Relations Committee. That committee will need to approve the Tillerson pick in order for the full Senate to vote on his nomination; it's currently at a 10-to-9 Republican-Democratic split.

Donald Trump is nominating Rex Tillerson for secretary of state. The Post's Anne Gearan explains what he brings to the table and why Congress could reject him (Video: Sarah Parnass/The Washington Post)

Tillerson's stake in ExxonMobil will certainly raise questions at a confirmation hearing. Once Russia annexed Crimea in 2014, the United States instituted sanctions against Russia that froze ExxonMobil's Arctic agreement. Were those sanctions to be lifted, the deal would probably move forward — making Tillerson's shares of ExxonMobil stock much more valuable. (The Wall Street Journal noted that he'd probably have to divest from that stock if appointed to run the State Department.)

Tillerson's position on climate change may be to the left of Trump's. ExxonMobil understood the connection between greenhouse gas emissions from fossil fuel use and the warming climate as early as 1977, according to recent reporting. It then proceeded to combat the idea, recognizing the risk posed to its industry by curtailing fossil fuel use. Only fairly recently did it acknowledge that link publicly, and the company is now on record in support of accepting the established science and identifying solutions to the problem of climate change.

That shift happened under Tillerson's leadership. The issue of climate change will be a potent one for whoever takes over the State Department, given the long-standing international diplomacy efforts to address the issue. Shortly before this year's election, ExxonMobil issued a statement in support of the sweeping agreement reached in Paris at the end of last year aimed at cutting down on carbon dioxide emissions internationally.

Trump said repeatedly on the campaign trail that he opposed the Paris agreement and has regularly expressed his opposition to taking action to address climate change. Tillerson, as CEO, promoted positions contrary to that. His most recent personal comments echoed the sentiment of his company, calling the threat of climate change “real” and “serious” — though the extent to which he was speaking as a representative of ExxonMobil vs. his own views is worth asking.

Tillerson is a lifelong Boy Scout. Tillerson was an Eagle Scout in his youth and eventually became president of the national organization. It was under his leadership — and through his advocacy — that the organization embraced the membership of young men who identified as gay.

Tillerson's positions on a variety of other political issues are largely unknown. Climate change is central to what we know about Tillerson, thanks to the industry of his long-term employer. The Wall Street Journal noted that Tillerson supports free trade — which, as a CEO of a major international corporation, is probably a natural position. Beyond that, it's not clear where Tillerson's politics align with or differ from his possible boss's.

His political giving suggests an alignment with establishment Republican politics, having given to the Republican Party of Texas repeatedly, to House Speaker Paul D. Ryan (Wis.) and to other national Republican priorities. So it probably isn't a surprise that...

... Tillerson originally supported Jeb Bush for president. He gave Bush the maximum allowable contribution in September 2015.