The following named individuals have successfully completed the English XL Variable Incidence Tribometer certification course, including class room instruction, satisfactory completion of the written exam and demonstration of proper operating technique with the VIT and have been designated CXLTs. Others who were formerly certified but have not renewed have had their certificates revoked.

Dean Ahlberg
Richard Anderson
Susan Armstrong
Alan Avrich
Brad Avrit
Thomas Baird
Thomas Baker
Gary Bakken
David Barnett
Fawzi Bayan
Jeff Beam
Philip Beard
Tim Behrens
Kelly Bernish
John Bolig
T. R. Bongartz
John Brault
Dwight E. Brown
John Bullerman
Mark Burns
Buddy Burton
Joseph Champagne
Kerrie Cheng
Sharon Chiou
Anthony D. Cornetto
David Dainty
Robin Daddar
Ron Dale
Elise Dann
Frederick O. Davidson
Eric Deyerl
Steve Di Pilla
Lawrence Dinoff
John Douglas Dixon
Richard Downing
Bryan R. Emond
David Elliott
Ralph C. Engdahl
Jason English
T. Page Eskridge
Gary Eure
Albert J. Ferrari
James Flynn
Bill Forbes
Donald Fournier
David C. Fritz
Ricardo Galdos
Fred Gelfant
Joellen Gill
Rick Gill
Kelly Golda
Norman B. Golinkin
Larry G. Goodwin
Vern Goodwin
Brian Goud
Juliet Gridley
Virginia Griffin
Joe Hageman
Albert Harkness
Robin Harrison
Charles Hayes
Kimberly Hawthorne
Paul Herman
Steven High
Frank Hilberg
James Hoffman
Kevin Hong
Neal Howard
Isaac Ikram
David Ingram
William Jacobs
Dean Jacobson
Brent Johnson
Chris Johnson
Daniel Johnson
Brian Jones
Lorna Kaaloa
David Karlin
Michael Kaufmann
Orion Keifer
J. Rolly Kinney
Andy Knysh
Ted M. Kobayashi
Sam Kodsi
Tyler Kress
Michael Kuzel
Terry Lee
John Leffler
Craig Luker
Bruce Lunning
Michael McIntyre
Rosie Mackay
Glenn MacLean
Steven Marchand
William Marletta
Matthew Mecham
Alan Keith Miller
Jonathan Milton
James Mitchell
Nick Montagna
William Montante
Roger Mooney
Zac Moore
Mike Morgan
Frank Mullen
David Natalizia
Richard Nellis
Gary Nelson
Kenneth Nemire
William Neuman
Neil Opfer
Russel D. Payton
Julius Pereira
Frank Perez
Theodore Petritsch
Thomas Pienciak
Steven Pietropaolo
Jim Potter
Jay W. Preston
Mack Quan
Richard W. Rauseo
Bradley Rechamp
George R. Reicherter
Daniel Riedel
Erik Reitz
Andrew Rentschler
David Roberts
James Royston
Robert Rupp
Richard Ryabik
Jim Rymsza
Craig Salmon
Carl Sheriff
Gary Singleton
Bridget Smith
Michael Stapleford
Paxton Starksen
Fred Steinlein
Cheryl Stewart
John Stewart
Arthur Thomas
Kyle Tierney
Dale Thumann
Alan C. Topinka
Dean B. Tuft
M. Reza Vaghar
Kenneth T. Vail
Douglas Vesperman
Keith Vidal
Richard Vogel
Roy Wadding
Ken Waldman
Ralph Walter
Richard Warner
George Widas
David P. Wills
Erin Wilson
Eric Winkel
Ned Wolfe
Brad Wong
Wilbur Yaxley
Robert Zaralban
Ronald Zollo