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

Joseph Dorman

Garden State Septic Service LLC
Washington, New Jersey
Phone #: (908) 319-3379
Type: Advanced
Credential expiration date: 4/30/2020

Edward T. Terry


Washington, New Jersey
Phone #: (908) 689-4934
Type: Advanced
Credential expiration date: 1/31/2021

John Sarappa

Bio Remediation LLC
Waterford Works, New Jersey
Phone #: (856) 753-8000
Type: Advanced
Credential expiration date: 11/30/2020

Lance Poppe


Waverly, Iowa
Phone #: (319) 415-9767
Type: Basic
Credential expiration date: 8/31/2019

Frank Semeraro

Frank Semeraro Construction Co, Inc.
Wayne, New Jersey
Phone #: (973) 305-0240
Type: Advanced
Credential expiration date: 3/31/2021

Jeffrey Rachlin

Onsite Management Inc
West Chester, Pennsylvania
Phone #: (610) 701-5805
Type: Advanced
Credential expiration date: 2/28/2021

Glenn Boughton

Boughton Enterprises inc.
West Milford, New Jersey
Phone #: (973) 697-2558
Type: Advanced
Credential expiration date: 5/31/2020

Frank A. Decker

Decker & Decker Const.
West Milford, New Jersey
Phone #: (973) 697-1363
Type: Advanced
Credential expiration date: 1/31/2021

Duane Gulick

D Gulick Construction LLC
Whitehouse Station, New Jersey
Phone #: (908) 534-4902
Type: Advanced
Credential expiration date: 1/31/2021

Kenneth Van Wyk

Ken Van Wyk
Woodcliff Lake, New Jersey
Phone #: (201) 994-5551
Type: Advanced
Credential expiration date: 5/31/2021

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