Education
McKienzie played on the volleyball team at Long Beach State from 1998 to 2001. In 1999, he was named to the All-American second team and the National Collegiate Athletic Association All-Tournament team His 58 kills against Brigham Young University broke an National Collegiate Athletic Association Division I record.
The following season, McKienzie led his team with 552 kills and was named to the AVCA All-American first team
In 2001, he had 435 kills and was second in the nation with a 5.58 kills per game average. He was an AVCA first team All-American for the second straight year.
Career
He was an All-American while playing for California State University, Long Beach (more commonly known as Long Beach State). He played for the United States national team at the 2012 Summer Olympics. College International McKienzie joined the United States. national team in 2001.
He was an alternate for the 2004 Summer Olympics team
In 2005, McKienzie led the United States. with 3.28 kills per set. The following season, he had 306 kills to rank second on the team
McKienzie left the national team before the 2008 Summer Olympics. He then played in Puerto Rico and Kuwait.
He had 21 points at the 2012 Summer Olympics.