Markwayne Mullin: New U.S. Secretary of Security from Oklahoma

Markwayne Mullin built a career that spans business, sports, and politics. The senator from Oklahoma first drew attention when, at the age of 20, he took over the management of his family’s plumbing company and turned it into a successful regional business. He later briefly competed as a professional mixed martial arts fighter before transitioning into politics, where he spent ten years in the U.S. House of Representatives and was elected to the Senate in 2022.

Now, Mullin is back in the spotlight after President Donald Trump announced his intention to appoint him as the next U.S. Secretary of Homeland Security, replacing Kristi Noem. In a post on Truth Social, Trump wrote: «I am pleased to announce that the highly respected U.S. Senator from the great state of Oklahoma, Markwayne Mullin, will be the Secretary of Homeland Security (DHS), starting March 31, 2026». Trump also praised Mullin as a «MAGA warrior and former undefeated professional MMA fighter», - adding that he believes the senator «will work tirelessly to secure our border» and «will be an outstanding Secretary of Homeland Security».

Given that Mullin’s nomination has attracted widespread attention, many are now interested in his biography, career, and financial status. Learn more about Mullin’s wealth and how he accumulated his fortune below.

Before entering politics, Mullin briefly competed as a professional MMA fighter. He fought in a small regional promotion from 2006 to 2007 and ended his career undefeated. However, since he had only a few fights and competed outside major organizations like the UFC, his earnings from his MMA career were relatively modest.

Mullin is considered one of the wealthier members of Congress. Recent financial reports estimate his net worth at around $ 60−65 million.

According to Fortune, Mullin accumulated most of his wealth through the family plumbing business, Mullin Plumbing, which he took over at the age of 20 and helped grow into a large regional company. His assets also include a significant cattle ranch in Oklahoma, as well as real estate and other investments. His business experience helped him amass considerable wealth before entering politics.

As a U.S. senator representing Oklahoma, Mullin receives the standard congressional salary, which is about $ 174,000 per year.

In March 2026, Mullin was nominated for the position of Secretary of Homeland Security following Noem’s departure. If confirmed for this position, his salary will change in accordance with the pay scale for cabinet members set for federal officials