He is a well known writer of many articles on the martial arts, and author of the book, "Traditional Goju Karate." Warrener is the founder of the Canadian martial arts publishing company Masters Publications, which published Richard Kim's books and republished many translated classic texts from Okinawan and Japanese karate masters. His most recent venture is Masters Martial Arts, a video production company, weapons manufacturer and book distribution company also known for its magazine Fighting Spirit Magazine. In addition to Richard Kim, Warrener's teachers also have included Benny Allen, Bob Dalgeish, Frank Lee, Don Lopez and the legendary Gogen Yamaguchi. In 1973 and 1981 Warrener broke the world's record for breaking bricks and boards. In 1968 he won the Canadian National Karate Championship, and in 1973 took kata and kumite titles at the Eastern Canadian Championship.