He graduated from South Pasadena High School in 1937, received his bachelor"s degree from University of Southern California in 1941 and earned his medical degree from the University of Southern California School of Medicine in 1944. He was a ship"s doctor while on active duty in the Naval Reserve in 1946-1947.
In 1949, in collaboration with Doctor Helen Martin, Maronde implemented a hemodialysis program for acute renal failure at what is now Los Angeles County- University of Southern California Medical Center. With their creation of an artificial kidney—it used a stainless-steel beer keg as a reservoir—they were at the forefront of medical innovation. And in the late "60s, Maronde developed one of the first—if not the first—computerized prescription drug systems, which was launched in the outpatient pharmacy at County- University of Southern California. "Here"s a doctor who got well enough acquainted with the computer in those days and really led the way." Doctor Maronde"s father, Doctor J. A. Maronde, was a Monterey Park physician credited with delivering 5104 babies over the course of his career.
Maronde Drive in Monterey Park was named in his honor.