Apple CEO Tim Cook's daily routine includes waking before 5 a.m., drinking Diet Mountain Dew during the day, and holding marathon meetings.

Big tech CEOs, including Tim Cook, have taken to social media to offer congratulations to President Trump, and to restate a commitment to contributing to growth, innovation, and jobs in the United States.

President-elect Trump told the nation Sunday that Apple under CEO Tim Cook may soon make an investment in the U.S., backing his promise to put America first.

Apple CEO Tim Cook, who is three years shy of conventional retirement age, has said he would like to continue working even after turning 67. Speaking on a recent podcast appearance on Table Manners, the 64-year-old tech leader opened up about retirement.

Plus, his early experience with hard work clearly paid off: After climbing the ranks at IBM for 12 years, Steve Jobs invited him to join Apple in 1998—and the rest is history. Now, he’s one of the highest-paid CEOs in America. Last year, Cook took home $74.6 million.

President-elect Donald Trump met with Apple CEO Tim Cook, he announced at his ‘Make America Great Again Victory Rally’, saying the CEO is planning to make an investment in the U.S.A., following DAMAC and Softbank.

I don’t see being at home doing nothing,' Tim Cook, 64, said. The Apple chief has a net worth of about $2.2 billion.

Among the key management skills he learned from Jobs was the importance of not being married to past beliefs, a competency that Cook says few leaders possess. Jobs welcomed debates, relished being challenged, and valued those who were willing to admit they were wrong when new evidence emerged.

Under his leadership, Apple shattered all previous records to reach a market capitalisation of over $3 trillion — bigger than the gross domestic product (GDP) of several nations.