Umanmielen is a long, explosive pass-rusher who thrives in a wide-9 alignment or as a stand-up outside linebacker in a 3-4 defense. His first-step quickness, bend, and closing burst make him an immediate third-down pass-rush weapon. He plays with urgency, a high motor, and active hands, but his play strength and block deconstruction in the run game need improvement. Umanmielen projects as a rotational pass-rusher early with the potential to become a full-time starter in an aggressive front.