[citation needed] While a member of the Tampa Bay Lightning, Dwyer achieved notoriety by receiving a 23-game suspension for leaving the penalty box to engage in a brawl, during which he verbally and physically abused officials, in a pre-season game against the Washington Capitals on September 19, 2000.

He played for the Lowell Lock Monsters of the American Hockey League (AHL), where he had 9 points and 183 penalty minutes in 56 games.

[citation needed] Dwyer was named head coach and associate general manager of the Summerside Western Capitals of the Maritime Junior A Hockey League for the 2009–10 season.

In 2010–11, Dwyer returned as the team's head coach and associate director of hockey operations leading Summerside to a second-place finish with a 36–12–1–3 record.

This recognition was attributed to his assistance in the development of Tuff 'n Lite, a unisex cut resistant protective sport sock.

On April 28, 2015, Dwyer was released after four years as head coach of the Rocket/Islanders earning a 116–133–9–14 overall record with the franchise, including a 35–28–1–4 his final post season when the Islanders defeated the Sherbrooke Phoenix to advance to the second round for the first time since 2004.

[4] On January 31, 2017, Dwyer parted ways with Zagreb to take over the head coaching position at HC Ambrì-Piotta of the Swiss top-flight National League A.

[10] Dwyer has also served as an assistant coach with Team Canada, start from when they won a bronze medal at the 2012 IIHF World U18 Championship in the Czech Republic.