Grandmaster Nelson Siyavong teaches Traditional Rhythm Muay Thai at ATC Gracie, Private Lessons and Instructor Certification Courses. He teaches the well-kept secrets of Clinching, Knee Striking & Defense Techniques. At the age of 60 he is one of the best Muay Thai teachers in the country. 

For the last 13 years he has tought Rhythm Muay Thai Seminars, Private Lessons, Classes & Instructor Certification Program at the following Schools, Gyms and Individuals (just to name the few):

1. IMB Academy by Master Richard Bustillo
2. Inosanto Academy of Martial Arts
3. CSW Training Center by Erik Paulson
4. Orange County Kickboxing & MMA by Daniel Sullivan
5. Dobler's Muay Thai Kickboxing by Kru Bryan Dobler
6. Rigan Machado
7. Joe Moriera
8. Alan Goes
9. Boran's BJJ by James Boran
10. Brazilian Top Team by Marcelo Perdomo
11. New Breed Academy by Johnny Ramirez
12. IMA Center by Mike Lee
13. West Coast Jiu-Jitsu & Muay Thai by Brian Espinosa
14. OC Jiu Jitsu by James Liu
15. MC Brazilian Jiu-Jitsu by Marcelo Cavalcanti
16. Gracie Barra in Cerritos
17. Gracie Barra in Corona by Tom Reusing
18. Marco Ruas Valetudo
19. Ray Cota BJJ, Muay Thai & MMA
20. Dion Watts BJJ
21. Junior Paulo Gazze
22. Betiss Mansouri
23. United BJJ by Rommel Dunbar
24. Sam Marcellini
25. Unbreakable Gym by Brian Warren
26. Brad Jackson with Ralph Gracie
27. CMS in by Tony Allen
28. West Coast Fight Academy
29. Body Shop Fitness by Antonio McKee
30. PKG Training Centerby Tahi
31. Main Event Gym by Roman Mitichyan
32. House of Champions by Sensei Mark Parra
33. Orange County Boxing Gym in by Clabe Garnes
34. Lakewood Martial Arts Training Alliance by Sensei Vince Velez
35. Zo Center Fitness & Martial Arts Center
37. Centerline Gym by Jerry Wetzel
38. American Martial Arts Academy by Master Derrick Kwak
39. Undisputed Training Center by Brett Albee
40. Body Shop Fitness & MMA by Antonio McKee
41. Alliance MMA (Muay Thai Technique Demo with Michelle & Kerry Vera)
42. Bear Essential Combat
44. Poway Kickboxing
45. The Boxing Zone by Kru Victor Beltran
46. Victor Candal MA School
47. OC Zulu Kai Boxing
48. Dan Pribble Kempo Karate @ Twin Peaks - Lake Arrow Head
49. Power of One Self Defense Institute
50. ASG by Karl Clover
51. Adrenaline Combat Sports & Fitness in San Bernadino
52. Adrenaline Combat Sports & Fitness in Temecula by Kenny Finister
53. MAI in Corona by Sensei Monton Roeksbutr
54. MAI in Anaheim Hills by Rick Manos
55. MAI in Anaheim Hills by Sensei Lonnie Huey
56. Seuaa Daao Muay Thai Gym by Aaron Malaszewski
57. Anthony J. Palafox at Throwdown Elite
58. Kickblast in Long Beach by Sayla
59. Eddie Loco Roa
60. Ken Rose Muay Thai
61. Kwon Dae Goo Tae Kwon Do
62. World Class MMA
63. ATC Grandmaster K.O. Spillman
64. Tyson Johnson in Victorville
65. Hector Ramirez, UFC Fighter
66. Budo Ryu in Saint Luis Obispo