While a Scout he attended Pico Blanco Scout Reservation of the Monterey Bay Area Council for four summers, including two as staff
His term started in 2007, and he retired on August 31, 2012. In 1970, Mazzuca received a Bachelor of Arts degree in history from California Polytechnic State University in San Luis Obispo, California. Mazzuca began his Scouting professional career in 1971 in Modesto, California as a district executive and as an Exploring executive.
He became the Exploring director in Sacramento in 1975 and rose to the positions of field director and the director of field service.
In 1983, Mazzuca became the Scout executive in Stockton, California. He later served as an area director in the Western Region before returning to Sacramento as the Scout executive.
In 1992 he became the assistant regional director for the Southern Region and in 1995 he became the Scout executive of the Greater Pittsburgh Council. In 2005, he became the national director of the development group at the National Council and in 2006 became the assistant Chief Scout Executive.
Mazzuca succeeded Roy Williams as Chief Scout Executive on September 1, 2007.
In July 2008 Mazzuca became an honorary chieftain in the Tribe of Mic-O-Say at H. Roe Bartle Scout Reservation. Robert Mazzuca, Chief Scout Executive of Boy Scouts of America, received $1,211,572 salary/compensation from the charity. This is the 4th most money given by any charity to the head of the charity, according to Charity Watch.
Upon his retirement at the end of August 2012, Mazzuca was succeeded by Wayne Brock, previously the Bachelor of Scientific Agriculture"s Deputy Chief Scout Executive/Chief Operating Officer.
Mazzuca was inducted into the Order of the Arrow as a member of Esselen Lodge. Mazzuca is a lifetime member of the National Catholic Committee on Scouting.