While working as a staffer for U.S. senator David Boren, Drummond earned his JD from Georgetown University Law Center in 1995.

After returning to Oklahoma, Drummond worked for a local law firm and served as an assistant district attorney in Pawnee and Osage Counties.

While in office, he has opposed public funding for religious charter schools and environmental regulations, while supporting capital punishment.

On January 13, 2025, Drummond announced he wouldn't seek re-election and launched a 2026 campaign for governor at a rally in Pawhuska, Oklahoma.

[1][4][5][6] He then attended Oklahoma State University–Stillwater, was a member of the Air Force ROTC, and received a bachelor's degree in agriculture economics in December 1984.

[1][7] Drummond was commissioned in the United States Air Force in March 1985, served for eight years, reached the rank of captain, and flew F-15C Eagles.

[4] He then attended the night program at the Georgetown University Law Center where he earned a Juris Doctor degree in 1995.

Drummond defended spraying the herbicide saying the federal government's position was "contrary to wildlife management and natural range development" and the public lands in question had been "formerly ours.

"[15] During the COVID-19 pandemic, Drummond's cattle ranch, US Cellular stores, and law firm received $3.6 million in Paycheck Protection Program funds over the course of two years; in the second year, the three businesses applied for and were approved for their loans from Blue Sky Bank, a bank which is also owned by Drummond.

[22] Oklahoma Senator James Lankford, Congressman Tom Cole, and Oklahoma City Mayor David Holt criticized Drummond's campaign for an ad claiming that Hunter supported jobs for undocumented immigrants and that such support led to the murder of Mollie Tibbetts.

[24] Drummond ran for attorney general again in the 2022 election, despite speculation he may instead run for Oklahoma's open senate seat.

The aftermath of McGirt v. Oklahoma was a dominant issue in the campaign: both candidates criticized the ruling, but O'Connor argued that litigation to overturn or winnow the ruling in McGirt was warranted, whereas Drummond championed a less litigious approach (the candidates also differed in their opinions on whether Congress should disestablish certain reservations at issue, with Drummond opposing such action).

The Tulsa World reported that Drummond's last donation to a non-Republican candidate for federal office was to Matt Silverstein's 2014 United States Senate campaign.

[37] On the last day of January, his office dropped the case against Classwallet filed by former attorney general John M. O'Connor for mishandling parts of a $31 million federal education grant.

[41] He was cited as wanting to fill the "role of bridge-builder between the state and Oklahoma's Native American tribes, a responsibility no attorney general has attempted to take on since the relationship between Stitt and tribal leaders first began to sour in 2019.

Gibson was charged after body camera footage showed him throw an 71-year-old man to the floor causing his hospitalization for a brain bleed as well as face and spine fractures.

[48] In March, he announced his office would seek to stay the execution of Richard Glossip until 2024 to allow an independent counsel to review the case.

[49] After the independent review was released, his office filed a motion to vacate the murder conviction of Mr. Glossip in April 2023.

[56] In April 2023, his office issued an opinion saying the law does not give the State Board of Education the ability to make administrative rules without proper direction from the state Legislature," meaning Ryan Walters's "rules regarding pornography in library books, sex education, parents rights and inappropriate materials" were unenforceable.

"[72] In March 2022, Drummond's son, Oklahoma Air National Guard Major Alexander Drummond, survived the crash of an F-16 he was piloting in Beauregard Parish, Louisiana during a routine training mission out of Ellington Field Joint Reserve Base in Texas after he erroneously ejected from the plane.