Full-Service Law Firm solving complex challenges through bold thinking, precise execution, and shared purpose.

Full Service Law Firm | Michael Best & Friedrich LLP

Specializing in the Intersection of Business &amp; Government

Meet our team of trusted advisors, strategic thinkers, and community builders dedicated to client success.

Learn about our full-service legal and business solutions, designed to address complex challenges for leading organizations across industries.

Access thought leadership, news, and resources to stay informed about the latest trends, legal developments, and industry innovations.

Discover how partnership, bold thinking, and precise execution drive results for clients nationwide.

Explore how our national reach and local expertise support clients across the United States and beyond.

Grow at a firm designed to bring out your best.

Professional portrait of Leah Hurtgen Ziemba

core/heading

Leah takes a big-picture approach in advising clients as they face challenges on environmental, food safety, and regulatory compliance issues. She draws on experience gained in cases involving the EPA, FDA, and other public agencies.

contentpilot/introduction

Leah’s success as a counselor, litigator and negotiator reflects her combination of subject matter expertise, industry knowledge, and creativity. Her work includes:

core/paragraph

Counseling clients through legal issues associated with PFAS and other contamination plumes that impact drinking water resources and residential homes

core/list-item

Investigating, assessing, and remediating vapor intrusion issues at sites with historic solvent contamination

Providing environmental liability assessments and risk management during transactional due diligence

Implementing the Food Safety Modernization Act and advising on food labeling matters (e.g., “natural” claims, standards of identity)

Navigating local, county, and state environmental regulations to permit and build or expand manufacturing facilities and commercial dairy operations

core/list

Leah has successfully negotiated State Pollutant Discharge Elimination System-related consent orders for agribusinesses with state regulatory agencies and the EPA. She has substantial experience with Per-and Polyfluoroalkyl substances (PFAS), including performing detailed legal analyses regarding the extent of state and federal regulatory authority related to PFAS compounds, evaluating PFAS-focused supply chain requirements and advising clients on best practices to assess current and historical PFAS risk exposures and related considerations. Leah has also achieved positive outcomes for clients with Concentrated Animal Feeding Operations (CAFOs) on environmental compliance matters.

core/block

Assisted a client that planned to open a large-scale dairy farm with environmental and regulatory permitting processes at the local, county, and state level

Advised a client involved in aluminum die-casting manufacturing on responding to soil, groundwater, and vapor intrusion contamination at an industrial location and off-site properties including counseling the client through a comprehensive environmental site investigation and several response actions. The client settled state and federal class action lawsuits and obtained a favorable historic insurance coverage settlement.

Worked on regulatory issues for a client providing animal health and veterinary health supplies and services. As part of a regulatory review of business structure in multiple states, Leah assisted with regulatory due diligence for an equity acquisition and also provided regulatory compliance training to company employees.

Guided a vegetable processor during acquisition due diligence. Leah advised on environmental and food safety matters to ensure seamless transition and continued production after acquisition

Advised an agribusiness on FDA enforcement regarding drug residue matters. Leah reached settlement with the FDA that addressed compliance matters that allowed the operation to continue operating and drafted going-forward compliance documents

Counseled a former wire manufacturer on soil, groundwater, and vapor intrusion concerns at historic manufacturing facility that was redeveloped for housing purposes. Leah assisted in addressing an immediate need regarding vapor intrusion risks to redeveloped housing property, and also advised on enforcement defense and regulatory compliance matters to bring site to regulatory closure.

Serves as the general counsel for a dairy trade association. Leah advises on corporate governance matters as well as environmental, labor, and employment, immigration and other matters affecting dairy farms in the Northeast U.S.

Counsels clients on compliance with California’s Proposition 65 warning requirements, including applicability issues for manufacturers, producers, suppliers, distributors, and retailers.

Prior to attending law school, Leah built her knowledge of the regulatory area working as a public policy specialist, regulatory coordinator and lobbyist in Albany, New York.

Madison

Legal Bites

Leah Hurtgen Ziemba

Credentials

Engagement

Insights

Forty-Seven Attorneys Recognized in Chambers USA 2026 Rankings

Legal Bites: Q1 2026 Edition

Gov. Evers Signs Wisconsin PFAS Legislative Package into Law

Credentials

Practices

Industries

Education

Admissions

Honors & Recognition

Engagement

Professional

Community

Insights

Forty-Seven Attorneys Recognized in Chambers USA 2026 Rankings

Legal Bites: Q1 2026 Edition

Gov. Evers Signs Wisconsin PFAS Legislative Package into Law

Slide Menu

Slide Search