Henry Oswald Simmons, Jr. (born July 1, 1970) is an American actor. He is known for portraying NYPD Detective Baldwin Jones on the ABC police drama NYPD Blue, from 2000–2005, and as Agent Alphonso "Mack" MacKenzie on ABC's Agents of S.H.I.E.L.D.Simmons was born in Stamford, Connecticut, the son of Aurelia, a school teacher, and Henry Simmons, Sr., an IRS Revenue Officer. He is one of three children, including his twin sister, and another sister. Simmons earned a basketball scholarship to Franklin Pierce University, where he earned a business degree.While attending Franklin Pierce University, he experimented in theater. After graduating from college, he briefly worked at a Fortune 500 company in Stamford. Unhappy with his job, Simmons moved to New York City and began to study acting and after a few bit roles, he landed a recurring role on the soap opera Another World.Since 2014, Simmons appears on ABC's Marvel's Agents of S.H.I.E.L.D., portraying S.H.I.E.L.D. mechanic Agent Alphonso "Mack" MacKenzie. After being a recurring character on season 2, he was promoted to a regular character for season 3, and for all remaining seasons.He married actress Sophina Brown in May 2010.

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