Niumatalolo, Davis and O'Brien met with the media following Tuesday's spring practice
Dan O'Brien joined the Navy staff on January 30 as an assistant outside linebackers coach and will assist Justin Davis.
O'Brien comes to Navy from Elon, where he was the defensive backs coach the past three years.
Prior to working at Elon, O'Brien spent four seasons as a defensive analyst and defensive graduate assistant at Alabama under the tutelage of Nick Saban and Kirby Smart. In O'Brien's four years at Alabama, the Crimson Tide went 43-11 and won the 2009 BCS National Championship. The Crimson Tide ranked fifth nationally in total defense, third in scoring defense and 10th in rushing defense in 2010 and ranked third in all three categories in 2009.
He has also had experience as a scouting assistant intern with the New England Patriots and Bill Belichick in 2005 and spent a year at Harvard working with the safeties in 2006.
O'Brien's father, Tom (`71), was a three-year starter at defensive end for Navy and, after serving nine years in the Marine Corps, returned to Navy as an assistant coach for George Welsh from 1975-81. O'Brien went on to become the head coach at both Boston College and North Carolina State and is currently the Assistant Head Coach at Virginia.
O'Brien is a 2005 graduate of Boston College where he earned his communications degree and served as a student coach. He is married to the former Alicia Marcum and the couple resides in Annapolis.