Jacek Piecha
Partner
Attorney-at-law / PhD in Law
Jacek specializes in administrative law and procedure. He focuses on investment and regulatory processes in environmental and infrastructure areas. He combines many years of advisory work with academic experience. He is a PhD in Law and an assistant professor at the University of Warsaw.
He advises on complex cases that require precise risk management. He supports investors at every stage of the investment process. From strategy, through spatial planning, to environmental assessments, and representation before authorities and administrative courts.
He also handles unusual regulatory cases with a high level of complexity. These include complex legal issues and multi-layered evidence proceedings.
Clients value his non-standard approach to problem solving and his ability to turn complex issues into clear strategies.
Jacek is the author of many academic publications, including books and articles. He is also a co-author of well-known commentaries on administrative procedure law. He teaches trainee attorneys in Warsaw. He has also given lectures in Zagreb, Budapest, and at the University of Amsterdam.
Outside work, he likes reading and traveling.
My Experience
Professional experience
Jacek gained experience by advising international and Polish clients in the energy, fuel, and construction sectors. He worked on investment processes and regulatory matters. He advised and represented clients in environmental and construction proceedings. He also worked on geological and mining concessions. He represented a leading fuel company in a case about transferring over 200 hydrocarbon concessions after an acquisition. Before founding ERS Legal, he worked in Polish and international law firms.
Areas of specialization
Investment process
- support in planning investment timelines
- preparation of legal strategy for the investment process
- review of compliance of investment and environmental documents
- representation of investors before public authorities and stakeholders
- handling administrative proceedings to obtain required decisions
- representation in administrative and court proceedings
Administrative regulation
- legal advice on business activities that require permits, licenses, or registration
- support in obtaining permits, licenses, and other decisions
- representation before public authorities supervising regulated activities
- analysis of compliance with administrative regulations
Administrative proceedings and complex regulatory cases
- handling complex administrative proceedings
- preparation of litigation strategy in key or precedent cases
- representation in cases about withdrawal, change, or transfer of rights
- advice on licenses and permits in regulated sectors
- legal support in cases with many parallel proceedings
My publications
PFAS restrictions in the EU. When the bans apply and what producers need to do
PFAS restrictions in the European Union are no longer a distant prospect. Some bans already apply, further ones take effect in 2026, and hanging over ...
Publication Environmental protection
PFAS restrictions in the EU. When the bans apply and what producers need to doA New Era in Metal Packaging
Preparing Your Business for PFAS and BPA Restrictions The food packaging industry is at a crossroads. Upcom...
Publication Product law
A New Era in Metal PackagingPackaging Revolution: How to Prepare Your Business for the PPWR?
How to Prepare Your Business for the PPWR? A pivotal moment is approaching in the world of environmental re...
Publication Product law
Packaging Revolution: How to Prepare Your Business for the PPWR?Environmental Seminar
We are pleased to inform you that in November 2026 our traditional Environmental Seminar will take place. For many years, this event has served as ...
Training Environmental protection
Environmental SeminarBuilding supervision orders tree removal – does it have the authority to do so?
When an authority imposes an obligation without a legal basis, a business can find itself facing real risk of sanctions. This is precisely what happen...
Publication Environmental protection
Building supervision orders tree removal – does it have the authority to do so?Does a height limit always apply without exception? An example of a successful appeal
A refusal to grant a permit for the expansion of a facility does not always mean the end of a project. Often, the key lies in correctly interpreting t...
Publication Environmental protection
Does a height limit always apply without exception? An example of a successful appealCan a PV installation increase flood risk? An example of successfully challenging a refusal to approve
A negative opinion from Wody Polskie can effectively block an investment, particularly during a period of heightened administrative caution following ...
Publication Environmental protection
Can a PV installation increase flood risk? An example of successfully challenging a refusal to approveThe PFAS Limits: What Applies from 12 August
On 30 March 2026, the European Commission published its Guidance document and FAQ on the implementation of the Packaging and Packaging Waste Regulatio...
Publication Product law
The PFAS Limits: What Applies from 12 AugustSee all
My specializations
Security of the investment process
Many investments are not stopped by regulations – they are stopped by public protests, the actions of environmental organisations, prolonged proceedings, and risks that were not properly managed. We advise investors at every stage of the investment process, from the first decision through to effective defence before the courts in any disputes that may arise.
Environmental protection
Environmental regulations affect not only compliance, but what matters most in business: the pace of investment, operating costs, and security. In this area, knowing what the law says is not enough. You also need to know how to translate it into concrete actions and sound decisions.
Do you need legal support for an investment or product?
Contact me.
jacek.piecha@erslegal.com +48 696 070 805