Maj. Gen. Adam Joks, 54, will take up the position in the summer, serving as deputy to Lt. Gen. John S. Kolasheski.
Polish and U.S. officials said Monday that the appointment underlines the two nations’ strong defense ties.
A far-flung forward command of the V Corps was launched in Poznan, Poland, last fall, as part of Washington’s response to Polish concerns about regional security at a time of Russia’s increased military activity.
Around 5,000 U.S. troops are based in Poland.