Tree of Knowledge

The Tree of Knowledge is a posthumous tribute to ASNT members whose contributions have significantly impacted industry professionals, fostering the growth of both ASNT and the field of nondestructive testing.

The Tree of Knowledge honors those whose dedication and expertise have shaped the nondestructive testing (NDT) industry. The names of these distinguished individuals are engraved on the tree’s leaves, creating a lasting memorial to their invaluable contributions. At the base of the tree, nine stones bear the names of ASNT’s founding members, recognizing their foundational role in the Society’s history.

Submit a Nomination

Nominations are accepted at any time and are subject to approval by the Board of Directors to ensure that only those who have made significant and lasting impacts on the industry are honored.

To submit a nomination, download and complete the evaluation sheet. This checklist helps ensure that all necessary information is provided and that the nominee meets the established criteria. Once completed, submit the evaluation sheet along with your information.

Download Evaluation Sheet

Honored Members

John K. Aman

Robert T. Anderson

Robert A. Baker

Garry Balestracci

Leslie W. Ball

Douglas W. Ballard

John P. Battema

Ross A. Beckley

David L. Bell

William F. Bennett

Harold Berger

Francis C. Berry

Carl E. Betz

William Archibald Black

John E. Bobbin

Bernard W. Boisvert

Irving Boyce

Donald E. Bray

Charles W. Briggs

William W. Briody

Joseph F. Bush Jr.

John Callinan Jr.

Harriet Carlsen

O.R. Carpenter

William D. Carruthers

Joseph Catanzano

John Cavanagh Jr.

Don E. Childers

Don L. Conn

William D. Coolidge

George M. Corney

Alvin F. Cota

Edward L. Criscuolo

Maurice J. Curtis

Lutz W. Dahlke

Donald Dannelley

Don Dannelly

Vernon Davison

Clyde Denton

Desmond D. “Duke” Dewey

Joseph Dewton

Paul Dick

B. Boro Djordjevic

Louis R. DiValerio

Robert G. Dunn

Louis Elliot

Roy W. Emerson

Donald C. Erdman

Maynard B. Evans Jr.

Nat Faransso

Floyd A. Firestone

Dale T. Fister

Thomas Flaherty

Friedrich Förster

Julian R. Frederick

Leonard Garcia Sr.

Leonard Garcia Jr.

Richard Gaydos

John F. Geagan

Thomas O. Gilliland

Lawrence Goldbery

Solomon Goldspiel

Burton S. Goranson

William S. Gould III

Robert E. Green Jr.

Ernie G. Grimson

Daniel C. Guldner

Donald J. Hagemaier

David O. Hall

Edward E. Hall

Lawrence Haller

Ronald Halmshaw

Carlton H. Hastings

William E. Havercroft

Howard Heffnan

Stuart Herbein

Eugene Herlihy

William C. Hitt

Cary E. Hohl

Benjamin J. Hoitsma

Vilma Holmgren

Richard R. Holste

Kent R. Van Horn

James Houf

Harold Hovland

Elijah W. (Bill) Huddleston

Jess W. Jackson Sr.

Kenneth D. Jakabcin

Harlan D. Jean

Philip D. Johnson

George W. Johnson

Gilbert E. Joly

Lawrence E. Bryant Jr.

Bryant E. Justice

Noah A. Kahn

Harold S. Kean

William D. Kiehle

Chase J. King

Janis A. Knauer Miller

Felix Kusenberger

Richard H. Lambert

John V. Lammers Jr.

Robert W. Larson

Clarence E. Lautzenheiser

John D. Lavender

Horace H. Lester

Hugo L. Libby

Paul J. Long

Carlton G. Lutts

E. Mason Marcus

Don McBride

Robert W. McClung

Don M. McCutcheon

Howard J. McFaul

Warren McGonnagle

Richard D. McGuire

James McKenna

Robert C. McMaster

Robert F. Mehl

John P. Molony

Patrick O. Moore

Gordon Morgan

Robert N. (Ol’ Bob) Mosure

Richard B. Moyer

Charles W. Musser

Donald T. O’Connor

Daniel E. O’Halloran

Edwin Oclon

Joyce Odell

Roy L. Odell Jr.

Daniel E. O’Halloran

Robert B. Oliver

John W. Orner

Earl R. Pade

Fred C. Panian

Frank C. Parker

George L. Pherigo

Raymond A. Pulk

Eugene R. Reinhart

Chester F. Robards

Maryellen Robards

Samuel James Robinson

Vincent F. Roding

Robert J. Roehrs

Fred W. Rohde

Justin G. Schneeman

Rudi Schumacher

William Scott

Richard H.W. Seifert

Ronald H. Selner

Stephen M. Senne

Steven Serabian

Carl B. Shaw

Gerald Shea

William C. Shell

Sam I. Shelton

Charles N. Sherlock

Amos G. Sherwin

George J. Shewchuk

Kermit Alvin Skeie

Kirit V. Smart

Gordon E. Smith

Kenneth A. Smith

Richard B. Socky

Jack C. Spanner Sr.

David L. Spooner

Charles R. Stauffis

Ferdi B. Stern Jr.

Robert G. Strother

Lee R. Stroud

George Struck

John L. Summers

Robert C. Switzer

George T. Taylor

Gerold H. Tenney

Willys E. “Tommy” Thomas

R. Bruce Thompson

James Treat

Ralph E. Turner

Kent R. Van Horn

John G. Vancil

Maurice I. Vannier

William F. Via Jr.

Sharon I. Vukelich

Leonard E. Wechsier

Samuel A. Wenk

George C. Wheeler

William E. Widner

John H.G. Williams

Paul A. Zayicek

Robert H. Zong

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