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
Susan Armstrong
Alan Avrich
Brad Avrit
Thomas Baird
Thomas Baker
Gary Bakken
David Barnett
Fawzi Bayan
Jeff Beam
Philip Beard
Tim Behrens
Kelly Bernish
Grant Bevill
Neil J. Bigelow
John Bolig
T. R. Bongartz
David Bosch
KristinBota
John Brault
John Bullerman
Mark Burns
Buddy Burton
Sharon Chiou
Anthony D. Cornetto
David Dainty
Robin Daddar
Ron Dale
Elise Dann
Frederick O. Davidson
Mary M. Dawson
Eric Deyerl
Steve Di Pilla
Lawrence Dinoff
John Douglas Dixon
Richard Downing
William ElDorado
David Elliott
Bryan R. Emond
Jason English
T. Page Eskridge
Albert J. Ferrari
Terence J. Fischer
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
Brian Goud
Juliet Gridley
Virginia Griffin
Joe Hageman
Charles Hayes
Kimberly Hawthorne
Steven High
Frank Hilberg
James Hoffman
Kevin Hong
Neal Howard
Douglas M. Hrobak
Isaac Ikram
David Ingram
Edward Ingram
William Jacobs
Christopher Janson
Dean Jacobson
Brent Johnson
Daniel Johnson
Jason Johnson
Brian Jones
David Karlin
Philip Kass
Michael Kaufmann
Orion Keifer
J. Rolly Kinney
Ted M. Kobayashi
Sam Kodsi
Michael Kuzel
Stephen F. Lander
Cindy LaRue
Terry Lee
John Leffler
Craig Luker
Bruce Lunning
Michael McIntyre
Rosie Mackay
Steve Marchand
William Marletta
Matthew Mecham
Donald Metcalfe
Jonathan Milton
James Mitchell
Nick Montagna
Larry Montgomery
William Montante
C. Brian Moody
Roger Mooney
Zac Moore
Frank Mullen
David Natalizia
Richard Nellis
Gary Nelson
Kenneth Nemire
William Neuman
Neil Opfer
Russel D. Payton
Julius Pereira
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
John N. Schwartzberg
David Scott
Carl Sheriff
Gary Singleton.
Michael Stapleford
Paxton Starksen
Frederick Steinlein
John Stewart
Wade Sticht
Robert Stoskus
Lane Swainston
Robert Taylor
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
Richard Warner
George J Wharton
George Widas
David P. Wills
Erin Wilson
Eric Winkel
Ned Wolfe
Brad Wong
Wilbur Yaxley
Robert Zaralban
Ronald Zollo