Monahan is an expert in crowd control and the management of police operations at major events. He directed police operations during the 2002 World Economic Forum, the 2004 Republican National Convention, the 2003 World Series and 2009 World Series at Yankee Stadium, as well as the 2013 Major League Baseball All-Star Game at Citi Field. During his 35 years of service with the department, Monahan has been honored 28 times for excellent police duty and eight times for meritorious police duty.