Mutekanga was born in Uganda on December 1st, 1987. He is currently living in New York City, NY where he is completing his studies and serving as a coach at St. Bernard's School, an all boys school on the Upper East Side East Harlem border.
On January 21, 2012 Julius qualified for the IAAF World Indoor Championship in the 800M run. He currently competes for the Central Park Track Club New Balance. His qualifying time at the New Balance Games at the Armory was 1:48.00. For times in the year 2012, his time is in the top ten. He qualified for the World Indoor Championships, which took place on March 9th, 2012 in Istanbul, Turkey.