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Approved Auditors

Approved Green Tier/EMS auditors

Green Tier law, §299.83, requires that participants in the program have their environmental management system (EMS) audited by an "outside environmental auditor" at regular intervals; every third year for Tier 1 participants and every year for those in Tier 2. The law also states that the outside environmental auditor be approved by the department, §299.83(7m).

A list of approved Green Tier auditors is below. These auditors have demonstrated to the department that they meet the requirements of an outside environmental auditor, as defined in Green Tier law.

If you are interested in becoming an approved Green Tier auditor, or would like your current auditor to be approved, we have developed an auditor approval process (CO-519).

Sang Albracht

Grand Rapids, MI

Karissa Anderson

Member, Operational Manager, Lead Auditor
Perfect Environmental Performance
529 N. Main Street, Cottage Grove, WI 53527, Website:
Office: 608-839-0129 Cell: 608-513-5117

I've been part of Perfect Environmental Performance (PEP) for 12 years. I hold the positions of Member, Operational Manager and Lead Auditor. I started my auditor experience in 2009. I completed the ISO 14001 Lead Auditor Training and became a GT auditor in 2014. I have completed over 30 EMS audits in more than 10 different organizational and business categories. PEP members have worked with over 30 organizations to assist in development of their initial EMS. I've provided EMS internal auditor training and provide ongoing guidance for organizations on an on-call basis. I believe an EMS is a valuable tool for any organization. My auditing style is based in this belief. I educate when auditing to see how your organization can mold an EMS to capitalize on its advantages. I hold a Master of Science degree from UW-Milwaukee. Other work experiences include retail sales and counseling in non-profit settings.

Tom Bennett
Tom Bennet

Total Quality Systems LLC
Sturgeon Bay, WI 54235

Bio on experience and services:

Employment Experience Summary:

  • Consultant/trainer/auditor (15 years) supporting many companies (specializing in small to medium size businesses) to ISO (9001 & 14001), OHSAS 18001 management systems implementation, and improving existing management systems. Implemented corporate quality systems, process control systems, environmental, and Health & Safety management systems, as well as FDA compliance systems.
  • Retired engineer (28 yrs.) with Fortune 500 Company leading processes and programs in: quality, environmental, manufacturing, materials management.
  • ISO 14001 - former consultant with national environmental consulting firm.
  • QMS & EMS & OHSAS lead auditor for at one time 4 Registrars, certified ISO 9001-2015, ISO 14001-2015, OHSAS 18001:2007. IRCA Lead Auditor
  • Certified Wisconsin Green Tier Auditor (9 years)

Education and Training

  • B.S. Industrial Engineering, Iowa State University
  • MBA, University of Wisconsin
  • IRCA Accredited 3rd Party QMS Lead Auditor
  • ISO 9001:2015 and ISO 14001:2015
Sarah Burton
Sarah Burton

Kestrel Tellevate LLC
Madison, WI

Bio on experience and services:
As a Senior Consultant specializing in EHS management and compliance assurance, Sarah has over 30 years of risk assessment, regulatory compliance, due diligence, and management system experience built on a solid technical background. She has provided strategic advisory services to numerous Fortune 500 companies to drive business value from EHS matters, including sustainability, risk management, compliance, and eco-efficiency. She is a Lean Six Sigma Green Belt and uses these tools to further drive EHS improvements. Sarah has developed and facilitated the implementation and improvement of ISO9001, ISO14001, and OHSAS 18001/ISO 45000 management systems at numerous facilities, resulting in measured increases in business value through EHS improvements. She is a certified environmental compliance auditor and WI Green Tier auditor.

Lori Cunniff
Lori Cunniff

Lori Cunniff
Merritt Island, Florida

Ms. Cunniff has over 35 years in the environmental field. Lori is a Certified Environmental Professional, Academy of Board-Certified Environmental Professionals (CEP); a Certified Hazardous Materials Manager (CHMM), a Certified Occupational Safety Specialist (COSS), a Qualified Stormwater Inspector and Instructor (QSI), a Registered Operator Training Provider for Storage Tanks (FL); a Hazardous Materials and Hazardous Materials Prep & Response Instructor and a Sustainable Green Printing auditor. Her degrees include a M.S. in Environmental Management from University of Maryland, MD and a B.S. in Biology, from SUNY, College at Cortland, NY. Lori has a wide range of environmental experience including sustainability, regulatory compliance, auditing, hazardous waste management, management systems and natural resource management.

Monty Fox

MB&J Quality Consulting
Indianapolis, Indiana

Monty Fox

Monty Fox has over 20 years as either an EMS consultant/trainer and/or ISO14001 registrar auditor. He performs around 100 audit days a year to the ISO14001:2015 standard for a variety of industries and companies of all sizes. He compliments that work with ISO9001:2015 registrar audits as well with several of those audits being integrated systems between EMS and QMS.

April Greene
April Greene

Kestrel Tellevate LLC
Onalaska, WI
608-799-2166 (direct); 608-260-5816 (office)

April is an EHS professional with a demonstrated history of working in the environmental services industry, including assessment/audit, regulatory compliance, and procedure and plan development work. She has significant experience managing quality, facilities, safety, and regulatory compliance in a laboratory setting.

As a Consultant with Kestrel Tellevate LLC (KTL), April specializes in EHS management and compliance assurance. She brings a strong chemistry and laboratory background to projects and is particularly skilled in sustainability, data analysis, and analytical chemistry.

April has experience conducting environmental compliance and management system audits, vendor audits to ISO 14001:2015, and transition audits from ISO 14001:2004 to ISO 14001:2015. She has also written various environmental plans and policies and completed root cause inspections and corrective actions for clients. April is certified as an ISO 45001 and 14001 Lead Auditor, ISO 19011 Auditing Team Leader, OSHA 501/511 Trainer, ITAR Auditor, and WI Green Tier Auditor.

Liz Hillgren
Liz Hillgren

Kestrel Tellevate LLC
Saline MI

Liz Hillgren, CEA, CHMM, has over 20 years of experience in the environmental services industry. As a Senior Consultant for Kestrel Tellevate LLC, Liz's primary functions include regulatory research, environmental compliance auditing at industrial and chemical sites, and EHS compliance support. She has a deep understanding of various waste management options and regulations, including RCRA, TSCA and DOT. As a Certified Environmental Auditor (CEA), Liz understands the application of the principles, procedures, and techniques of auditing, as well as the regulations, and has applied these to effectively conduct audits for industrial clients across the U.S. She routinely conducts environmental and ISO audits for KTL's clients in various states and develops related procedures and training to help ensure regulatory compliance. Liz has been a Certified Hazardous Materials Manager (CHMM) since 1995, a CEA since 2015, and a certified Green Tier Auditor.

Diane Hjelter

Eau Claire, WI

Doug Johnson Ph.D.
Doug Johnson

Environmental Intelligence, Inc.
Amery, WI
612-387-3430, website: Environmental Intelligence, Inc.

Douglas B. Johnson is one of the most experienced auditors in the Green Tier program with emphasis on strategic management of energy and environment to optimize organizational social and economic performance in the context of society and nature. Dr. Johnson’s audits leave a company with unexpected value and appreciation of the full potential for business value that can be derived from use of the ISO standards or functional equivalency to make for a better company and a Better Wisconsin.

Rose Koronkiewicz

BSI Group America, Inc
Herndon, VA

Kevin Lehner
Kevin Lehner

Lake Mills, WI
Office: 920-648-4134; Mobile: 262-949-2965

Kevin is the president of Environmental Compliance Systems, Inc. (ECSI) (ECSI) and has been performing DNR Green Tier and ISO 14001 audits for over three decades. ECSI provides Green Tier, ISO 14001, 45001 and 9001 certification and internal audits for accredited certification bodies and other business clients. ECSI professional services include ISO management system consulting and Exemplar Global certified lead and internal auditor training courses.

Kevin is a recognized Expert by the US Technical advisory groups to both ISO 14001 and ISO 45001 Technical Committee (TC 207 and TC 283). He represents the US American National Standards Institute (ANSI) position on these standards at international meetings of the technical committees. Kevin is also the lead developer of, a cloud-based subscription app providing an effective corrective action workflow with supporting resources.

Amanda Lowe
Amanda Lowe

BSI Group
Indianapolis, IN
Office: 571-216-9546

  • ISO 14001, 9001, 45001/OHSAS, RC/RCMS lead auditor since 2014
  • Have conducted over 200 ISO 14001 audits
  • 20 years' experience in specialty chemical manufacturing
Mark McDermid
Mark McDermid

Sustainability Specialist
Wisconsin Manufacturing Extension Partnership
2601 Crossroads Dr, Madison, WI

Mark is a Sustainability Consultant with the Wisconsin Manufacturing Extension Partnership and provides support for the Wisconsin Sustainable Business Council. He is a trained lead auditor for several international standards, including ISO 14001 since 2001. He has guided implementation, facilitated stakeholder engagement, conducted internal audits and provided improvement support for ISO certified and functionally equivalent environmental management systems. He also integrates systems with business systems and sustainability programs for strategic decision making, metrics, credentials, planning and improvement.

Christian Mielke

E2M Environmental and Engineering Management
W223N7343 Carole Court
Sussex WI 53089

Jim Mueller - PE, CHMM, ASP
Jim Mueller

Environment, Health and Safety (EHS) Management Consultant.
Elm Consulting Group International, LLC.
Racine, WI
262-417-6136 (mobile)

Mr. Mueller has worked professionally for over 35 years in a wide range of EHS disciplines and operation types. Roles include environmental consultant in one of Wisconsin's largest law firms followed by 21 years in a variety of roles for SC Johnson leading to global EHS program support responsibilities. Since 2014, he has worked for Intertek as a certified ISO/OHSAS external management system auditor, volunteered as president to rescue a local watershed restoration NPO, and most recently in Healthcare as EHS Manager at a FDA regulated pharmaceutical production plant.

Now working independently, Mr. Mueller is Certified Wisconsin Green Tier EMS Auditor, Professional Engineer in Wisconsin, Certified Hazardous Materials Manager, Certified EHS Management System Auditor, and Associate Safety Professional (CSP pending). He holds undergraduate and graduate degrees in civil engineering from the University of Wisconsin-Milwaukee.

Wendy Nadon

Nadan Consulting Ltd.
151 Montgomery Blvd.
Orangeville, ON L9W 5C1
Fax: 519-940-9193

Steve Rowley, CHMM
Steve Rowley

Sr. Program Manager, EHS Management
Rettew Associates, Inc.
Lancaster, PA

Mr. Rowley is responsible for directing and managing RETTEW's environmental health and safety (EHS) management systems and EHS-related regulatory compliance services including EHS management system development and implementation, integrated management system consulting (environmental, health/safety, and quality), and regulatory and management system audit program development and implementation. Mr. Rowley is a Certified Hazardous Materials Manager (CHMM), President and founding member of the Capital Area Chapter of the Alliance of Hazardous Materials Professionals, and certified as a Lead Auditor by Exemplar Global and lead environmental. safety and quality management systems auditor with Lloyd's Register Quality Assurance, an accredited registrar. Mr. Rowley has a Master of Environmental Science and Management degree from Duquesne University.

John Senter
John Senter

The SenterStone Companies
Appleton, WI

Seasoned CEO and Quality Expert with 30 plus years in quality and environmental system management and auditing, my passion is helping companies succeed with improving their ISO Quality Management Systems by improving their processes and efficiency. John has found success helping with the implementation of several environmental systems. He is a helpful and fair auditor.

Lonnie Smith

DQS Lead Auditor

Meghan Stenslien
Meghan Stenslien

Kestrel Tellevate LLC (KTL)
La Crosse, WI

Meghan Stenslien is an EHS professional with over 10 years of experience as a regulatory compliance specialist, EHS program manager, and food safety practitioner. She has extensive experience preparing for and leading audits, including ISO 9001/14001/45001, Safe Quality Food (SQF), Responsible Recycling (R2), e-Stewards, vendor, and internal audits.

As a Consultant with Kestrel Tellevate LLC, Meghan specializes in managing compliance and certification programs and training staff in EHS and food safety requirements. Meghan has conducted routine compliance, safety, quality, and environmental audits and facility assessments and designed programs, policies, and procedures to effectively manage compliance and management system requirements.

Meghan is certified as an ISO 14001 and 45001 Lead Auditor, Responsible Recycling (R2) Lead Auditor, and Wisconsin Green Tier Auditor.

Hugh Tousey
Hugh Tousey

Eagle Group USA, Inc.
901 Tower Drive, Ste 420, Troy, MI 48098

Hugh is a business professional with over 35 years of management, consulting, auditing and training experience working in chemical processing, distribution, manufacturing, service, transportation, and assembly environments.

He is an Exemplar Global Environmental Management System Lead Auditor and a certified American Chemistry Council Responsible Care® (Both RCMS & RC14001).

Chris Unke
Chris Unke

Adapt Management Consulting
Sullivan, WI

Chris's background supports wide-ranging expertise in the areas of operations, quality assurance, production systems development and implementation, customer service, problem solving, corrective action, supplier development, design and development, resource management and project identification, prioritization and resource management. Well versed in the plant operating methodologies that support Lean, quality, purchasing, engineering and manufacturing.

As Principal Consultant provide a customer focused tailored solution for businesses including ISO 9001, 13485 and 14001 implementation and transitions, problem solving, internal auditing and continuous improvement. Cost effective solutions including virtual support.

Mark Zimmermann, P.E. & CPEA
Mark Zimmermann

Appleton, WI

Mr. Zimmermann routinely assists clients with the assessment, development, and implementation of management systems; and implanting changes that will more effectively manage risk, reduce cost, and/or improve culture. He draws upon over 30 years of experience managing, leading and advising clients on environmental, health and safety programs and systems at the corporate and plant levels; and has worked with organizations ranging in size from Fortune 100 companies to organizations having a single facility. Mr. Zimmermann has personally completed over 250 regulatory compliance and/or management systems audits of facilities throughout the U.S. and internationally, has directed and managed numerous audit programs, and is skilled as both an environmental and safety auditor.