He previously worked as a software engineer before pursuing a career as an actor after being convinced by his brother to do so.

Some of his noteworthy roles include Finral in Black Clover, Yūta Hibiki in SSSS.Gridman, Gen Asagiri in Dr. Stone, Sir Nighteye in My Hero Academia, Kaguya-sama: Love Is War, and Gyutaro in Demon Slayer: Kimetsu no Yaiba.

However, at the time he did not pursue acting and instead graduated from college with a degree in Japanese.

However, his brother forced him to audition for the town's local performance of Les Misérables, where he was eventually cast as a major character.

[1] McInnis is openly bisexual[2][3] and engaged to fellow voice actor J. Michael Tatum.