Growing up in a small town near San Francisco, Brennan spent his time divided between sports and theatre. By pure chance, on his fifteenth birthday, Brennan discovered the circus arts and with it, the perfect blend of the artistic and athletic. He spent many intense years studying under some of the world's finest circus and variety artists to create a unique style of performance that combines technically challenging elements with dramatic and theatrical execution.
As a freelance aerialist Brennan has performed for a variety of companies and events. Some of these include America's Got Talent, The Ellen Degeneres Show, Wintergarten Varieté, The Tonight Show with Jay Leno, Google, Emirates Airlines, P&O Cruises, Sea World San Diego, Norwegian Cruise Lines, and many more.
For five years and over 1,000 shows, Brennan traveled with the equestrian performance company Cavalia, as an aerial hoop soloist and rotating pole specialist in their show Odysseo. Heavily involved in its creation, Brennan traveled under the largest touring big top in the world and frequently acted as a company spokesperson for media events and special tours.
Brennan also co-owns Fl'air Sutdios, Berlin's premiere aerial training facility, artistic agency, and special event space. Through his classes at Fl'air and other workshops taught around the world, he is proud to teach and instill his passion of aerial arts and performance to others. He also enjoys traveling, cooking, photography, and web design.