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 A. Wallach


Ringwood, NJ
Phone #: (973) 583-9444
Type: Advanced
Credential expiration date: 1/31/2019

Todd W. Mabey

Harris Septic Service, LLC
Riverdale, NJ
Phone #: (973) 697-3399
Credential expiration date: 11/30/2015

Barry Wham

Wham Engineering Services, Inc.
Robbinsville, NJ
Phone #: (609) 731-6001
Type: Advanced
Credential expiration date: 3/31/2019

Rich Kimble

Rich Kimble & Sons
Rockaway, NJ
Phone #: (973) 664-9171
Type: Advanced
Credential expiration date: 1/31/2019

Nick Sergeant

Sergeants Septic & Excavating
Roscommon, MI
Phone #: (989) 821-6640
Type: Advanced
Credential expiration date: 2/28/2019

Rosemary Decie

Yellow Dog Environmental Consulting, Inc.
Salisbury, MA
Phone #: (978) 465-1337
Type: Advanced
Credential expiration date: 5/31/2016

Bruce Osojnak


Salt Lake City, UT
Phone #: (801) 363-7733
Type: Advanced
Credential expiration date: 12/31/2016

James L. Miller

Miller's Septic Service, Inc.
Saluda, VA
Phone #: (804) 693-2075
Credential expiration date: 2/28/2017

James L. Miller, III

Miller's Septic Service, Inc.
Saluda, VA
Phone #: (804) 693-2075
Type: Advanced
Credential expiration date: 2/28/2017

Paul Behrens

English Sewage Disposal Inc.
Seabrook, NJ
Phone #: (856) 358-4771
Type: Advanced
Credential expiration date: 4/30/2019

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