Individual CIOWTS Credential Holders

Please note all those appearing on this list hold an active CIOWTS credential with NEHA. If a credential's expiration date is past due, it is possible the credential holder is working with NEHA to bring the credential up to date. If you have questions with regard to the information posted please contact the NEHA Credentialing Department at 303-756-9090 ext. 310 or email any inquiries to credentialing@neha.org.

Find a CIOWTS Credential Holder in Your Area

City, state or credential holder's name

Richard T. Carlson


Mays Landing, New Jersey
Phone #: (609) 625-4829
Type: Advanced
Credential expiration date: 5/31/2019

Gary T. Ervey

L. N. Rothberg
Mendham, New Jersey
Phone #: (732) 687-7412
Type: Advanced
Credential expiration date: 1/31/2021

Gerald Smith

Bedminster Excavation
Milford, New Jersey
Phone #: (908) 619-4914
Type: Advanced
Credential expiration date: 1/31/2021

William V. Walsh

Value Sewer and Drain Services
New City, New York
Phone #: (845) 494-0848
Type: Advanced
Credential expiration date: 1/31/2020

Albert Christmann

Albert Christmann Inc.
Newfoundland, New Jersey
Phone #: (973) 728-6911
Type: Advanced
Credential expiration date: 1/31/2021

Scott Richard Newell

Sunrise Environmental Inc.
Newfoundland, NJ
Phone #: (973) 309-0824
Type: Advanced
Credential expiration date: 1/31/2020

John Zisa

Water Resource Technologies
Newfoundland, New Jersey
Phone #: (973) 697-3220
Type: Advanced
Credential expiration date: 5/31/2019

Michael J. Lacken


Newton, New Jersey
Phone #: (973) 670-5220
Type: Advanced
Credential expiration date: 9/30/2019

David Muller

Muller Excavating Inc
Newton, New Jersey
Phone #: (973) 222-6433
Type: Advanced
Credential expiration date: 7/31/2019

Thomas L. Heaton

Heaton Contracting
Newton, New Jersey
Phone #: (973) 534-1197
Type: Advanced
Credential expiration date: 12/31/2019

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