Rivera-Santiago is in her first season as a graduate assistant coach for the SEU volleyball program. She will also be serving as an assistant coach for the Southeastern beach volleyball team in the spring.

Keniah was a two-year standout at libero for Southeastern, where she was a four-time Sun Conference Defender of the Week, one-time NAIA National Defender of the Week, and placed First Team All-Sun Conference in 2018.

On October 31, 2018, Rivera-Santiago reached the milestone of 1,000 digs during her two-year career at Southeastern.

Prior to SEU, Keniah competed for two seasons at NCAA Division I North Carolina Agricultural and Technical State University.

Rivera-Santiago has also served as a coach for the Southern Select Volleyball Club Team, as well as for Club Skills Camps and 13U Club Teams.

Keniah is pursuing her Master's in Marriage and Family Therapy. She currently works at Raising Teen Girls, a counseling center for teenage girls.

Keniah is the daughter of Lizbeth and Heriberto Santiago and sister of JJ, Shaelier, and Sanneri Santiago. Her mother Lizbeth played volleyball for the Panama Women's National Team.