Eoghan was born into a family of musicians and music lovers--his grandfather played trumpet in the US Army Band during World War II, his father was a member of the renowned traditional Irish band Skara Brae, and he has close family ties to legendary traditional Irish artists Altan, Micheal O Domhnaill, Tríona Ní Dhomhnaill, Maighread Ni Dhomhnaill, and Dáithí Sproule.

At 15, Eoghan joined Vex, his first professional band. Over the next 16 years, he would tour internationally and record half a dozen albums in the Vex drum chair. He has also worked extensively as a touring and recording session drummer for artists including Beach Slang, Specimen 13, Cha Blasco, Teratism, The Invincible Czars, Opposite Day, Bat Castle, Adrian Benavides, Earthdiver, Aly Tadros, Joseph “Pinetree” Macry, and Gentry Garcia. He currently drums for Obsequiae and Aduanten.

Nowhere has Eoghan been busier than in jazz, improvised music, and New Music circles, serving as the long-running drummer for The Jon Klekman Trio, The Mitch Chandler Trio, and for Florida-based guitarist and composer Matt Butler’s two main creative outlets–the Matt Butler Quartet and the avant garde big band, End of the World Orchestra. Since 2015, Eoghan has led his own jazz group, The Mispronunciation of Eoghan McCloskey, where he has performed with musicians including Daniel Foose (Lady Gaga), Brian Donohoe (Adrian Quesada), Alex Browne (US Air Force Band), Tommy Howard (Elias Haslanger), Jon Lundbom, and Sean Giddings (Pat Green).

Though mostly self-taught, Eoghan has studied under 2-time Grammy nominee Matt Thompson (King Diamond), Corey Fonville (Christian Scott), Daniel DuFour (Joshua Redman), Pat Mastelotto (King Crimson), and Dave Elitch (Miley Cyrus, The Mars Volta). Eoghan also taught drumset at Capitol Music Center, Oak Hill Drum Studio, Austin Music Exchange, and Strum Music School.