Sandy Onweller Dielman
Sandy  Onweller Dielman

Volunteer Assistant Coach

Alma Mater:
San Diego State ('05)


Former Aztec Duo to Compete at FINA World Masters Championships

Former Aztec duo to play at FINA Worlds


No. 14 SDSU Water Polo Defeats Alumni, 15-14

No. 14 Water Polo defeats Alumni, 15-14


Alumni Downs Water Polo in Sudden Death OT

SDSU Alumni downs Water Polo in sudden death OT

Bio entering 2013-14 season.

Sandy Onweller Dielman joined the Aztec staff in December 2013 with junior college and high school coaching experience. The former 2004 SDSU All-American most recently spent three seasons as an assistant coach at Miramar Community College. Prior to that, Dielman was the head varsity coach at Westview High School for two seasons after stints at Southwestern Community College and Palomar College.

During her playing career at San Diego State, the former Sandy Onweller earned two letters (2003-04) and helped the Aztecs to a 21-12 record in 2003 and a 26-9 effort in 2004, en route to a national ranking of No. 6 and 7, respectively. SDSU's 26 victories in 2004 were the second-most wins in program history at the time.

At the end of her two-year career atop Montezuma Mesa, Onweller ranked ninth on the all-time assists chart with 45. In the Aztec single-season record book, Onweller sat in fifth place on the assists list with 31 in 2004. Today, Onweller's six-goal performance vs. Hawai'i on Feb. 26, 2004, still stands as the fifth-best goal scoring performance in program history.

Before arriving at SDSU, Onweller played two seasons at Palomar College where she helped lead the Comets to the Pacific Coast Conference championship in 2000. That same season, Onweller was an All-American, PCC most valuable player, all-PCC performer and all-Southern California honoree.

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