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

Michael Willey

Willey & Co., Inc.
Seaford, Delaware
Phone #: (302) 629-8024
Type: Basic
Credential expiration date: 2/28/2018

Doug H. Sutton

Sutton Construction
Shell Rock, Iowa
Phone #: (641) 426-6974
Type: Basic
Credential expiration date: 12/31/2019

Donald M. McAllister

Professional Waste Water Services Inc
Shenandoah, Iowa
Phone #: (712) 246-4312
Type: Advanced
Credential expiration date: 2/28/2019

Jeffrey Pearce

United Sewer & Drain Service Corp.
Slate Hill, New York
Phone #: (845) 742-2785
Type: Advanced
Credential expiration date: 12/31/2019

Robert Wayne Crissman


Sophia, NC
Phone #: (336) 880-6740
Type: Advanced
Credential expiration date: 2/28/2019

Robert W. Crissman


Sophia, North Carolina
Phone #: (336) 880-6740
Type: Advanced
Credential expiration date: 2/28/2019

Daniel L. Wilson

Wm H Wilson Enterprises Inc
Sparta, New Jersey
Phone #: (973) 219-1221
Type: Advanced
Credential expiration date: 3/31/2019

Thomas Alfsen

Berardi Building Company
Sparta, New Jersey
Phone #: (973) 729-8899
Type: Advanced
Credential expiration date: 9/30/2019

Thomas Rusticus

Wm. H. Wilson Enterprises, Inc.
Sparta, New Jersey
Phone #: (973) 222-7161
Type: Advanced
Credential expiration date: 3/31/2019

Joel Robert Buis

J.R. Buis Excavating LLC
Stanhope, NJ
Phone #: (973) 347-8158
Type: Advanced
Credential expiration date: 10/31/2018

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