2015-16: Competed at the 2016 U.S. Olympic Trials in the 200 back ... Academic All-Big Ten honoree ... Part of the 800 free relay team that ranks second on NU's all-time depth chart with a time of 6:26.76 ... Swam Northwestern's second-fastest 200 free time (1:38.26) ... Posted NU's fastest 500 free time (4:24.47) of the season at the Big Ten Championship ... Showcased his versatility at the league championships with a personal season-best 200 back time of 1:45.70.
2014-15: Member of Northwestern's middle-distance freestyle group while also excelling in the 200-yard stroke distances … Academic All-Big Ten … Ranked in five different events on NU's top times list following the season … Was second in the 200 free, third in the 500 free and 1,000 free, fourth in the 400 IM and fifth in the 20 IM … Also anchored Northwestern's top 800 free relay at the Big Ten Championships, achieving the second-fastest time in school history … Qualified for the bonus final of the 200 free at the Big Ten Championships with a career-best NCAA 'B' cut of 1:37.07 before winning the heat and placing 17th overall … Also made the bonus final of the 200 back with a career-best 'B' time of 1:45.37, eventually placing 21st in the conference … Competed in the 500 free as his third individual race at the B1G meet, coming in 28th … Made two championship finals and three consolation finals at Northwestern's home TYR Invitational (11/21-11/23) … Finished sixth in the 500 free, seventh in the 200 free, ninth in the 200 back, 12th in the 200 fly and 14th in the 100 back at the TYR … Time of 1:54.65 in the 200 fly was a career best … Swam the 500 free and 200 back at the AT&T U.S. Winter Nationals (12/3-12/6), swimming a then-career-best 1:49.40 in the 200 back … Scored dual-meet points with eight different top-five finishes … In addition to winning the 500 free, swam a career-best 1:54.16 in the 200 IM to take second in that event on Senior Night against Milwaukee (1/16) … Also had a career-best in the 400 IM at Minnesota and Purdue (1/31).
2013-14: Freshman posted seven NU top times ... Competed in the Big Ten Championships in the 500 free, 200 free, and 200 back ... Finished 46th Big Ten and third NU in the 500 free 4:31.32, finished 52nd Big Ten and third NU in the 200 free 1:40.42, and finished 32nd Big Ten third NU in the 200 back 1:49.83 ... Finished second 500 free, fourth 200 free, and fourth 200 back vs. E. Mich/Illinois (10/18) ... Finished fifth 200 free and 500 back, and posted the fifth NU top time finishing third in the 200 IM 1:55.45 vs. WKU (10/25) ... Finished sixth in the 200 free and 200 back, also posted the fourth NU top time in the 400 IM with a fourth place finish 4:08.26 vs. UIC/Wyoming (11/9) ... Finished third in the 1000 free vs. Wisconsin (11/15) ... Finished sixth in the 200 Free and seventh in the 500 free vs. ND, Michigan (1/11) ... Finished third in the 100 free, fifth in the 500 free, and posted the third NU top time in the 1000 free 9:39.24 vs. Iowa (1/25) ... Finished third in the 200 free and second in the 200 back vs. Milwaukee (1/31).
High School: Ranked the No. 4 overall recruit from the state of Minnesota by Collegeswimming.com ... An all-state, all-conference and all-America honoree during his prep career ... Three-time team record holder in the 200 free, 500 free and 400 free relay ... Four-time pool record holder in the same events plus the 200 free relay ... Competed for the Team Foxjet club for nine years ... All-time, all-age club state record holder in the 1,000 free ... Multiple time team record holder with Foxjet ... Scholastic All-American and voted Team's Hardest Worker ... Multiple time A Honor Roll Activist.
Personal: Born Jonathan D Lieberman ... Son of Kurt and Lisa Lieberman ... Chose Northwestern over Minnesota ... Major is applied mathematics and economics.
LIEBERMAN'S CAREER BESTS
| Event | Career Best |
| 200 freestyle | 1:37.07 |
| 500 freestyle | 4:26.58 |
| 1,000 freestyle | 9:39.24 |
| 200 backstroke | 1:45.37 |
| 200 butterfly | 1:54.65 |
| 200 individual medley | 1:54.16 |
| 400 individual medley | 4:06.62 |