The unrivaled success of the Pioneers during her tenure has made McNamara one of the most successful coaches in the sport's history. McNamara has compiled a 179-33 record, ranking second among active Division II coaches in winning percentage (.844) while also ranking as the seventh-winningest coach among all divisions by percentage. McNamara's 179 wins ranks fifth all-time in Division II.

Under McNamara's guidance, the Pioneers have captured two NCAA Division II National Championships (2012, 2013), while compiling nine NCAA Tournament appearances and five East Coast Conference titles.

McNamara's mentorship has helped multiple Pioneers earn attention on the national stage. Goalkeeper Olivia Kirk was twice named IWLCA Goalkeeper of the Year (2016, 2017), while attacker Jackie Sileo earned IWLCA Attacker of the Year three times. Sileo was also a finalist for the 2014 NCAA Division II Woman of the Year award and was featured in Sports Illustrated's "Faces in the Crowd" during her career. Bridgett Soares was also a finalist for the Division II Woman of the Year award in 2012, while Dominique Mosca and Chelsea Donaldson joined Sileo as IWLCA Players of the Year in 2012. McNamara was tabbed as IWLCA National Coach of the Year in 2012 and 2013 after leading the Pioneers to consecutive National Championships.

LIU Post recorded one of six undefeated seasons in Division II history during the 2013 season, outscoring opponents 338-141 during that stretch. During the NCAA Tournament, Sileo scored with six seconds remaining during the National Semifinal against Adelphi, leading the Pioneers to their second consecutive championship appearance where LIU Post took down Limestone 10-7 for the program's fourth national title.

A native of East Northport, N.Y., McNamara was an assistant coach at LIU Post for two seasons (2006-07), where she helped the Pioneers to a 33-2 record. Her coaching helped the team to a perfect 17-0 record in 2007, en route to the program’s second NCAA Division II National Championship.

Prior to coming to LIU Post, McNamara spent four seasons as assistant coach at nearby Stony Brook University. She was actively involved in recruiting for the Seawolves program and was instrumental in developing individual workouts and offensive game strategies. McNamara was the assistant director of Stony Brook Lacrosse Camps and Clinics during her stay at the school and spent the final four months of the 2005 calendar year as the program’s interim head coach.