Brennan began his dance training at a small ballet studio in South Dakota at the age of ten. He has attended summer training intensives with Los Angeles Ballet, Ballet West, Cecchetti Council of America International Summer School, Brigham Young University, and Central Pennsylvania Youth Ballet. He was a featured dancer on PBS’s South Dakota Symphony Young People’s Concert. He represented the United States at the Cecchetti International Classical Ballet competition in 2014. At the age of sixteen, Brennan was awarded a full scholarship and spent two years training full-time at CPYB. There, he studied under Marcia Dale Weary, Alan Hineline, and Simon Ball. He was selected to work with guest choreographers Price Suddarth, Shayla Bott, Simon Powell, and Simon Hoke. Brennan also worked as a guest artist for the Virginia Youth Ballet. Some of Brennan’s favorite roles have included performing as Prince Desire in Sleeping Beauty, Franz in Coppelia, and Sugar Plum Cavalier in The Nutcracker. Brennan is going into his second season dancing with the St. Paul Ballet, where he is the assistant to the Artistic Director.