2014: Mattar went to nationals in five events. . .She finished third in the 200 breaststroke, sixth in the 400 IM, eighth in the 200 IM, 11th in the 200 butterfly, and was a part of the 400 medley relay that finished in 11th place. . .She won GLIAC titles in the 400 IM (4:21.04) and 200 breaststroke (2:14.18) which were both conference records. . . She holds Ashland University swimming records in the 200 fly (2:02.40), 200 breast (2:13.04), 200 IM (2:03.91), and 400 IM (4:20.94). . . She was also named a scholar all-american.

2013: Mattar finished third at nationals in the 200 breaststroke with a 2:17.61. . . She was also a part of the 400 medley relay that finished in 12th place.