Saad Al-Kaabi - who heads state-owned QP, the largest exporter of Liquid Natural Gas and one of the biggest oil companies in the world - said today he expected US policy to remain similar to that exercised under previous presidents.
"Projects that we get into are projects that we get into for 25 to 30 years," he said.
"They survive seven, eight presidents or whatever.
"The president is a businessman. Bringing in foreign investment into the US is something that I think he would want.
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Fears have been raised elsewhere about a new protectionism being used by Washington.
China, Germany and France's leadership have warned in recent weeks against tougher trade rules being imposed by the US.
QP already has joint ventures with America's ExxonMobil, whose former chief executive Rex Tillerson is now Trump's secretary of state.
And trade between cash-rich Qatar and the US is set to grow after Doha's government said last year that it wanted to invest USD 35 billion in the US by 2020.
Kaabi added that his company would pursue a growth strategy for the foreseeable future, including major international projects, as it adjusts to depressed global energy markets in recent years.
"As far as our strategy is concerned we are in a growth mode and we are going to continue to be in a growth mode for quite a while." he told international journalists at QP headquarters in Doha.
"Some will be national, the majority will be international."
Among the projects QP is looking at overseas is gas and oil exploration off the coast of Cyprus, he said.
Kaabi added that he believed Qatar would be a leader in the LNG market "for a long time".
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