Adam Jonathan Dutkiewicz (often abbrieviated to Adam D, born April 4, 1977) is best known as one of the guitarists (along with Joel Stroetzel) and backup vocalist from Massachusetts metalcore bands Killswitch Engage and Aftershock.

Dutkiewicz attended the Berklee College of Music in Boston, where he studied production, engineering, and bass guitar. While at college, he began playing in the band Aftershock with friend Joel Stroetzel. Stroetzel would later join Dutkiewicz, Mike D'Antonio, and Jesse Leach in forming Killswitch Engage. Dutkiewicz was the drummer of Killswitch Engage, until the release of its second album, Alive or Just Breathing, when he moved to guitars, and Tom Gomes became the band's drummer.

He has assumed the role of producer on all of Killswitch Engage's records. He has also produced for the bands As I Lay Dying, Underoath, The Acacia Strain, Unearth, All That Remains, From Autumn To Ashes, Johnny Truant, Parkway Drive, The Agony Scene, Every Time I Die and others.

He is also responsible for most of the band's postponed tour dates due to damaging his back, which he puts down to "bending so far over so he can fit into photos with fans".

Adam has a side project called Burn Your Wishes, with Ken Susi of Unearth.

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