Mr. Mederos was born and raised on a farm west of Tulare, California. He is a graduate of Tulare Western High School (1969) and College of the Sequoias (1971). He graduated Cum Laude in 1973 from the University of California, Los Angeles (UCLA). He attended San Joaquin College of Law in Fresno and graduated in 1977 having been conferred the degree of Juris Doctor. He was admitted to the practice of law in December of 1977 in both the state of California and the Eastern District of

California in the United States District Court.     
     Mr. Mederos began his practice of law with the Fresno County Public Defender's Office in 1978 and later joined the law firm of Soares and Rowson (the predecessor firm to Horswill, Mederos & Soares) as an associate in February, 1980. He has practiced law in the County of Tulare for over 25 years and has an emphasis in the general practice of the law with a specific focus in the field of agriculture. He handles criminal and civil litigation, transactional matters, agricultural and dairy leases, dairy water agreements, easements, real property transactions, business law, and estate planning.
     Mr. Mederos has served on the Board of Trustees of the Tulare County branch of the American Cancer Society, the Board of Trustees of the Tulare City Historical Society, is a past President of the Tulare-Angra do Heroismo Sister City Foundation and is a member of the Tulare County Cabrillo Club and the Roma Lodge of the Sons of Italy. He also served the community in 2002 as chairman for the Tulare Joint Union High School Boundary Redistricting Committee.
     As a result of his commitment to the community and to non-profit organizations, Mr. Mederos has received several awards for his service. These awards include being a two-time recipient of the American Cancer Society's Esther Greenberg Memorial Award for notable contributions in his fundraising efforts in support of cancer control in Tulare County and, along with his wife Cathy, he was awarded the Golden Apple Award for service to education by the Tulare County chapter of the Association of California School Administrators (ACSA).
     From 1991-1992, Mr. Mederos was the President of the Tulare County Bar Association and he served on its board for eight years. He is currently General Counsel for the Tulare Chamber of Commerce and serves on the board of the College of the Sequoias Foundation. In 1998 he was appointed to serve on the founding committee for the Tulare County Community Focus Court Planning Team.
     In February of 1975 Mr. Mederos was recognized by the Chief of Police for the city of Fresno for his efforts in pursuing and apprehending an escaped convict immediately following a robbery attempt. In the commendation, Chief of Police H.E. Britton acknowledged that the actions of Mr. Mederos brought great credit upon him.
     Mr. Mederos married his wife Cathy in 1979 and they reside in Tulare, California. They have three children; Melissa, Megan and Michael. His wife Cathy is a past board member and past president of the Tulare City Historical Society. She is also currently a board member with the Tulare Youth Services Bureau. His daughter Melissa graduated from the University of California, Irvine (UCI) in 2004 and is currently an executive assistant for Congressman Devin Nunes of Tulare (21st District of California). His daughter Megan graduated in 2006 from the University of Southern California (USC) and his son Michael is currently attending the University of California, Los Angeles (UCLA).