FERC Chairman Kevin McIntyre was diagnosed with a brain tumor last summer and has since undergone successful surgery, he disclosed Sunday.

McIntyre, who had been co-head of the global energy practice at Jones Day, was nominated by President Trump last July to a term at the Federal Energy Regulatory Commission that expires June 30 and an additional term expiring June 30, 2023. He was confirmed by the Senate on Nov. 2.

The health issue "arose unexpectedly last summer," McIntyre said in a statement released Sunday on the FERC website.

"Through an incidental finding, i.e., a medical issue discovered by accident, I was diagnosed with a brain tumor. I was very fortunate that the tumor was relatively small, that I had no symptoms, and that I was otherwise in excellent health.

"Thereafter, I underwent successful surgery, followed by the post-operative treatment that is the standard of care for my situation. I was advised at the time that, with the surgery and subsequent treatment behind me, I should expect to be able to maintain my usual active lifestyle, including working full time, and that expectation has proven to be accurate."

The White House, members of Congress and officials at FERC were "aware of the situation," McIntyre said.

"For reasons of personal and family privacy, I do not intend to provide further details or updates on this subject, except to say that I am grateful that my health is now stable and that I am able to devote my full energy to serving the American public every day as chairman of the FERC and continuing to work to earn the trust that has been placed in me."

It was unclear if McIntyre's treatment played any part in his delayed swearing in or that of Commissioner Richard Glick. Swearing in ceremonies at FERC customarily come within a few days of Senate confirmation votes. But McIntyre and Glick weren't sworn in until Dec. 7, more than a month after Senate confirmation. The swearing in of McIntyre and Glick gave FERC its full complement of five members for the first time since October 2015.

McIntyre and Glick's nominations to FERC received unanimous approval by the Senate Energy and Natural Resources Committee, but were first delayed when Sen. Jim Inhofe (R-OK) objected to a motion by Sen. Lisa Murkowski (R-AK) for their confirmation by unanimous consent.

McIntyre, a Republican, practiced law at Jones Day for most of his nearly 30-year legal career. He is a graduate of San Diego State University and Georgetown Law.