He previously served as the director for strategy, plans, and policy of the Joint Staff from 2022 to 2024 and as commander of the United States Third Fleet from 2021 to 2022.

[2][3][4][5] Koehler was born in Norfolk, Virginia,[1] and raised in San Diego, where he graduated from Mt.

Other seaborne assignments include tours in Fighter Squadron (VF) 211, VF-41 and executive officer of the USS Carl Vinson (CVN-70).

He was the Director of Operations of the United States Indo-Pacific Command from June 2018 to October 2020.

[7][9][10] In July 2023, Koehler was nominated for promotion to admiral with assignment as commander of the United States Pacific Fleet.