Koslowsky (formerly Fleming), a native of North Carolina and graduate of Miami University in Ohio, joined Triangle in 2004. Koslowsky attended Cardinal Gibbons High School in Raleigh and led her team to state championship wins every year. She was named All-Conference and All-State, and set two records in her senior season for single season kills and digs. Koslowsky was a TISAC Co-Player of the Year in 2001 and her #9 jersey hangs retired at Cardinal Gibbons. She went on to Providence College for two seasons where she was an outside hitter and still holds the single season digs record. Before graduating Cum Laude in 2007 from Miami University she finished her college career with two seasons in the libero spot.
Koslowsky holds a degree in philosophy and English from Miami and graduated in 2012 with Magna Cum Laude honors and a master's degree in Christian studies from Duke Divinity School. She has coached Triangle teams in the 12s, 14s, 16s, 17s, and 18s age groups. Koslowsky was also the Duke Women’s Volleyball volunteer assistant coach during the 2012 season.
She currently works for St. David's School in Raleigh as the director of camps and programming where she also assists the middle school volleyball team.
Koslowsky joined Triangle in 2013 and has served as an assistant coach in the 15s, 17s, and 18s age groups. In 2015 Koslowsky was an assistant coach of 17 Blue, which finished 12th in the Premier Division at AAU Junior Nationals. In 2016 he helped lead 17 Black to qualify in Open for USAV Junior Nationals, and in 2017 he helped guide 18 White toward a third-place finish in the Club Division at the JVA World Challenge. Koslowsky holds a bachelor's degree in construction engineering and management from NC State and currently works for commercial general contractor Williams Realty & Building Company as a project mananger. He played on the NC State men’s club team for two years and helped lead them to back-to-back second-place finishes at the NCVF National Tournament in 2012 and 2013. Koslowsky has been playing volleyball since seventh grade and continues to play both locally and nationally.
Koslowsky and his family moved to Raleigh from Canada in 2007.