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

Jacob Schipper

JCS Excavating
Wantage, NJ
Phone #: (973) 445-5875
Type: Advanced
Credential expiration date: 1/31/2019

Richard Vreeland

Vreeland Enterprises LLC
Warwick, NY
Phone #: (973) 332-3327
Type: Advanced
Credential expiration date: 5/31/2019

Edward T Terry


Washington, NJ
Phone #: (908) 689-4934
Type: Advanced
Credential expiration date: 1/31/2017

Edward T. Terry


Washington, NJ
Phone #: (908) 689-4934
Type: Advanced
Credential expiration date: 1/31/2019

Joseph Dorman

Garden State Septic Service LLC
Washington, NJ
Phone #: (908) 319-3379
Type: Advanced
Credential expiration date: 4/30/2018

Robert Rhinehart

Rhinehart Excavating
Washington, NJ
Phone #: (908) 689-1604
Type: Advanced
Credential expiration date: 6/30/2018

David Simmons

Hapchuk Inc.
Washington, PA
Phone #: (724) 222-6080
Type: Advanced
Credential expiration date: 1/31/2018

John Sarappa

Bio Remediation LLC
Waterford Works, NJ
Phone #: (856) 753-8000
Type: Advanced
Credential expiration date: 11/30/2018

Frank Semeraro

Frank Semeraro Construction Co, Inc.
Wayne, NJ
Phone #: (973) 694-3038
Type: Advanced
Credential expiration date: 3/31/2019

Jeffrey Rachlin

Onsite Management Inc
West Chester, PA
Phone #: (610) 633-6746
Type: Advanced
Credential expiration date: 2/28/2019

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