An Irish-American tunnel worker has died while working on the East Side Access Project in New York, under the Grand Central Terminal.

Michael O’Brien (26) was struck by falling concrete at around 8pm on Thursday evening. The injured tunnel worker was taken to Bellevue hospital where he was pronounced dead. His father Robert, a project supervisor who arranged for his son to take the job,  performed CPR on his son in an attempt to resuscitate him at the scene, reports the Daily News.

O’Brien was an employee of Dragados, a contractor for the MTA.

“The Metropolitan Transportation Authority wishes to extend its deepest condolences to Mr. O'Brien's family and his fellow workers,” the agency said in a statement.

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The father and son were working on the Long Island Rail Road (LIRR) tunnel which is in the process of connecting the LIRR's Main and Port Washington lines in Queens to a new LIRR terminal beneath Grand Central Terminal.

Michael had only recently started the job, having just moved from Wisconsin in an attempt to turn his life around after being arrested on drug charges.

“Mike was a loving, caring, generous son and brother, and we’re very, very proud of him,” his mother, Judee O’Brien, told the New York Times. “He was very passionate about his work, and we’re going to miss him more than anything in the world.”