Harada was named the Cal State Fullerton head women’s basketball coach on April 17, 2017 by Athletics Director Jim Donovan. He is the Titans' 11th head coach in the program's 51-year history.  Harada will be embarking on his seventh season with the Titans in the fall of 2023.

The Titans fell victim to injuries during the 2022-23 season, forcing Harada to rely on his backcourt to average more than 35 minutes per game for most of the season. Harada led the Titans to the Big West Quarterfinal, where they fought through two overtime rounds before falling to Hawai’i, 82-75. The Titans went 14-16 overall and had three players named to All-Big West teams. Fujika Nimmo and Una Jovanovic were named to the All-Big West Second Team, while Demmonie Lagway received All-Freshman Team recognition. Harada finished his sixth season with the Titans one win away from earning his 100th win in a head coach position.

During the 2021-22 season, Harada took the Titans to their fourth consecutive Big West Tournament appearance and fourth in five years while at the helm at Cal State Fullerton. The Titans earned a first round win over Cal Poly, the team's third consecutive year with a tournament victory. Lily Wahinekapu was named Big West Freshman of the Year while Carolyn Gill was named Big West Hustle Player of the Year.

The 2020-21 season was challenging for the Titans in numerous ways, starting with the shortened season due to COVID-19. After losing the team's starting backcourt from the prior season, roles changed quickly and the team had to shut down due to COVID in the middle of the season. The Titans qualified for the Big West Tournament and upset UC Riverside in the opening round. The Titans went 4-18 overall and Gabi Vidmar was named to the Big West All-Freshman Team.

2019-20, season three, was a breakthrough for Harada and the Titan's women's basketball program.  The team finished 17-14, the best Fullerton finish and first winning seasonsince 1990-91.  Wins included Harada's first Big West Tournament victory, a road win at UNLV for the first time since 1996, a win over CSUN for the first time since 2011, and a win at league-leading UC Davis, which snapped their 28-game home conference winning streak.

Cal State Fullerton led the Big West (all games) in points per game (67.4), field goals percentage (42.6%), and defensive rebounds (37.8).  Titan juniors Raina Perez, Taylor Turney and Carolyn Gill received all-conference honors:  Perez was named Big West Player of the Year, and First Team All-Big West.  Additionally, Perez was named Big West Player of the Week three times.  Taylor Turney was named to the Second Team All-Big West, and was a Big West Player of the Week.  Carolyn Gill was named to the Big West All-Defensive Team, and was selected Best Hustle Player by the Big West.  Eleven members of the 2019-20 team were included in the Big West Commissioners Honor Roll.

In 2018-19, Harada followed up his successful first season with one of the best seasons the program had seen in the last decade making the Big West Tournament for the first time since 2014-15. Overall, they finished with a 14-16 record which is the best mark since the 2009-10 season. In conference, Fullerton finished in sixth place with a 6-10 record marking the most Big West wins for the program in five years.

The team finished their non-conference schedule with an 8-5 record, the best non-conference mark in almost 30 years. Part of that success was a five-game winning streak at the end of November and into December which is the longest winning streak since 2008. The Titans also came out with a season sweep of UC Santa Barbara in conference play for the first time since 1991.

Harada saw three of his athletes garner All-Conference awards which is the first time multiple Titans earned Big West honors since the 2014-15 season. Among them was a Sixth Player of the Year Award for freshman Amiee Book. Book also earned a spot on the All-Freshman Team while Daeja Smith took home a First Team selection and Raina Perez earned an Honorable Mention.

Head Coach Jeff Harada enjoyed a successful first year at Cal State Fullerton in 2017-18,  leading the Titans to an 8-21 record. While the team missed out on the Big West Tournament for the third straight season, the eight total wins was more than the previous two seasons combined.  He also led the Titans to a 3-13 conference record, again more wins than the previous two years combined.

In his first season as a Division I head coach, Harada's Titans shot 38% from the field which is the highest mark for the program since the 2010-11 season when they shot 42.4%. The 59.9 points per game is the highest mark since the 2013-14 season while the 12.3 assists is the best mark since the 2010-11 season.