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In 2000 he tested for his 6th degree black belt at the Michigan summer camp, making him the highest tested rank in the U.S. under Remy Presas,[not in citation given] founder of Modern Arnis. He was granted the title Datu, or chieftain, by Presas shortly thereafter.
Hartman gives seminars and camps across North America and Europe. In June 2005, Hartman was promoted to 9th degree by the WMAA Advisory Board. This promotion reflects Hartman's leadership position within the WMAA, and is not meant to replace the rank that he earned from Presas.
Tim Hartman is a competitor in Nafma, where he holds state, national, and even a world title. His most recognized success in tournament fighting is in stick fighting, where competitors compete against one another in a form of sparring using two padded sticks to score points. He is also a notable practitioner in kata, specifically Filipeno kata, which is the event he currently holds the world title for.
Tim Hartman resides in West Seneca NY, and teaches at Horizon Martial Arts, the school he founded.
- February 2007 - Martial Arts Professional magazine - Featured "How Tim Hartman Sticks to Modern Arnis"
- BlackBeltMag.com/June 2004 edition "Martial Artists United for Stricken Child" By Craig Marks
- TaeKwonDoTimes.com/January 2004 edition "Marissa's Heroes" By Craig T. Marks.
- January 2003 - Fighter Magazine - Featured (http://www.fightermag.com/)
- March 2002 - Fighter Magazine - Interview (http://www.fightermag.com/)
- June 2002 - Inside Kung Fu magazine - Article by Dan Anderson - Mentioned in Article
- August 1998 - BlackBelt Magazine - "Modern Arnis: The Next Generation" (Black Belt Magazine, August 1998, by Paul O' Grady, M.S.)
- Unknown Date - Realfighting - Interview with Datu Kelly Worden - Mentioned in under "Who are the Datus of Modern Arnis?". https://web.archive.org/web/20071203012449/http://www.realfighting.com/1102/index.html
- Feb 2004 / July 2003 - MartialTalk Magazine Cover Photos:
- Book: "Warrior Arts of the Philippines" by Reynaldo S. Galang - ISBN 0-9727679-1-6 Publisher: Arjee Enterprises (April 2005) - Paperback: 457 pages : Pg 304 "Insights and Features" - Wrote included piece
- History of Modern Arnis
- Bio on personal site
- World Modern Arnis Alliance (organizational web site).
- School in West Seneca
- Tim Hartman Video