During his time at Azusa Pacific, Juan had been the head coach at Newport Harbor High School for the last five years. There he turned around a program that had won four games prior to his arrival, taking them twice to the CIF playoffs. During his tenure there, he had two Sunset League offensive players of the year recipients and two Daily Pilot (local newspaper) soccer players of the year. Current Azusa Pacific player, Caleb Candelaria was a former NHHS athlete under Juan Mares.
Prior to Newport Harbor High school, Juan worked with the Southern California Seashores as the men's assistant soccer coach for the PDL team for three season, their head men's amateur coach for three seasons and director of camps for their Seahorse Soccer Camp.
Coach Juan has also worked on the women's side. He had been the head coach at Rio Hondo College where in his second year took the team from last to first and was selected Foothill Athletic Conference Coach of the Year. Prior to Rio Hondo, he was the head coach at Missouri Baptist University where he help lead the program to the playoffs two years in a row. Prior to MBU, he was the womens head coach at El Dorado High School (Placentia, CA) for three years. There he led the team to three CIF appearances, reaching the semifinals twice and quarterfinals once. Prior to EDHS, he was the head coach at Santa Ana College, where he was the first coach in the women's soccer program to have a winning season and in his third year was selected Orange Empire Conference Coach of the Year.
Coach Mares has been coaching for over 25 years. He is the holder of the five highest coaching licenses in the United States, the USSF "A", "National Goalkeeping" "National Youth plus the NSCAA 'Premier' and "National Goalkeeping" license. He is also a Certified Strength and Conditioning Specialist (CSCS) through the National Strength Conditioning Association (NSCA). Juan graduated from Azusa Pacific University in 1990 with a degree in Physical Education. He continued his education at California State University Fullerton, where he received his Master's in Science in Kinesiology, double majoring in Biomechanics and Sport Psychology.
Juan has been married to the lovely wife Marjorie for eight years and have a five year old budding soccer star, Ricardo. They currently reside in Bellflower and attend the Vineyard Church of Anaheim (where they met). Juan is also currently coaching two teams from the Legends FC program. In his free time, he like to cycle, kayak, and spend time with his family at the beach.