At Thomas Jefferson, Marcos rowed all four years. He received a varsity letter his sophomore, junior, and senior years. His crews finished 3rd, 2nd, 1st, and 1st at the prestigious Stotesbury Regatta. He competed at the Henley Royal Regatta in 2006 and 2007. In 2007, Marcos was named to the Washington First All-Metropolitan Team.

Marcos is currently a freshman in Trumbull College. He intends to major in Mathematics. His interests include movies, sports, and applesauce.