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

Tobin Barkman

Toby Barkman Excavating, Inc.
Califon, New Jersey
Phone #: (908) 832-7757
Type: Advanced
Credential expiration date: 6/30/2020

David A. Lepor

Centerline Services LLC
Cape May, New Jersey
Phone #: (609) 884-7017
Type: Advanced
Credential expiration date: 4/30/2021

Jeffrey Van Mourik


Cape May, New Jersey
Phone #: (609) 377-1875
Type: Advanced
Credential expiration date: 4/30/2021

Douglas P. Fulford

Septic Solutions
Cape May Court House, NJ
Phone #: (609) 465-8402
Type: Advanced
Credential expiration date: 12/31/2019

Robert W. Crissman


Carthage, North Carolina
Phone #: (336) 880-6740
Type: Advanced
Credential expiration date: 2/28/2021

Heidi Peck

Linn County Public Health
Cedar Rapids, Iowa
Phone #: (319) 329-2934
Type: Basic
Credential expiration date: 8/31/2020

George A. Dickerson Jr.

Dickerson Mechanical
Colfax, Iowa
Phone #: (515) 674-4338
Type: Basic
Credential expiration date: 11/30/2020

Mark W. Kitchen

Mark Kitchen Excavating
Columbia, New Jersey
Phone #: (908) 459-4215
Type: Advanced
Credential expiration date: 3/31/2021

Joel Klein

Econo Rooter Services, Inc
Coquille, Oregon
Phone #: (541) 396-6529
Type: Advanced
Credential expiration date: 12/31/2020

Corey Engelbrecht

Engelbrecht Brothers Tiling DBA E.F.I.
Davenport, Iowa
Phone #: (563) 285-4244
Type: Basic
Credential expiration date: 3/31/2021

Pages