Pierandrea Bonali focuses his practice on banking and finance and debt restructuring transactions with a particular specialization in real estate and property finance, having gained a strong experience in these areas during his time other leading international and Italian law firms.
- Advised a primary Italian credit institution in connection with a term loan facility granted to an Italian real estate AIF aimed at supporting the financial needs connected to the acquisition and futuristic redevelopment of a real estate asset located in Milan, in the City Life area
- Advised a pool of Italian banks in connection with the term loan facilities granted to an Italian real estate alternative investment fund and owner of a significant real estate portfolio (with an estimated market value equal to EUR 2 billion) located throughout Italy and currently let to various public entities
- Advised a pool of banks in connection with term loan facilities granted to companies belonging to a leading operator in the real estate sector with particular reference to fashion outlets
- The Legal 500 EMEA, 2021
- University of Milan, JD
- Milan
- Supreme Court of Cassation
- Italian
- English

William R. Pomierski
William (Bill) R. Pomierski focuses his practice on the taxation of financial products and capital markets transactions, as well as on executive compensation matters. He is a former chair of the Firm’s Executive Compensation Practice Group.
Bill advises clients on the federal income tax implications of a variety of domestic, cross-border and global financial products and related transactions. He has worked extensively with public and private companies, hedge funds, trading firms, financial institutions, high-net-worth individuals, trust advisors and family offices in connection with a range of capital market and financial product issues. He has advised insurance companies, financial institutions, equipment manufacturers, retailers, energy companies, food processors and manufacturers, and chemical companies.
- Legal 500 US, Recommended, 2016-2018 and 2024–2025
- The Best Lawyers in America 2009
- Law & Politics, Illinois Super Lawyer
- Journal of Taxation of Financial Products, columnist, and past co-editor in chief
- University of Illinois College of Law, JD, magna cum laude
- Michigan State University, BS, with highest honors
- Illinois
- English

Oleg Polyatskiy
Oleg Polyatskiy focuses his practice on US and international tax matters. He advises multinational corporations on tax matters related to internal reorganizations, mergers and acquisitions, partnerships, debt instruments, consolidated returns, insolvency matters, cash repatriations, CFCs, and other international tax matters.
Oleg is a certified public accountant.
- Best Lawyers in America, Ones to Watch, Tax Law, 2024–2025
- Northwestern Pritzker School of Law, LLM
- University of Iowa College of Law, JD
- University of Iowa Tippie College of Business, MBA
- University of Iowa, BBA
- Illinois

Michael W. Peregrine
Michael W. Peregrine represents corporations, their boards of directors, and individual directors and officers in connection with the full range of governance, fiduciary duty, director liability and leadership issues. Much of Michael’s practice involves advising boards of directors on matters of sensitivity and controversy, often in connection with corporate and fiduciary crises. He is recognized as one of the leading national corporate governance counselors and is a respected interpreter of the law of fiduciary duties.
Michael is a Fellow of the American College of Governance Counsel.
- Chambers USA, Band 1 in Healthcare, 2005-2023; Senior Statesperson: Healthcare, 2024-2025
- American College of Governance Counsel, appointed as a fellow in 2024
- Best Lawyers in America, Healthcare Law, 1993-2026
- Thomson Reuters, Stand-out Lawyer – independently rated lawyers, 2024-2025
- Northwestern Pritzker School of Law, JD
- Texas Christian University, BA
- Illinois

Oscar Arcà
Oscar Arcà advises clients on international cross-border transactions, including M&A, private equity and joint ventures transactions and corporate restructuring. He has significant experience on all aspects of corporate and commercial law.
- Legal 500 EMEA, Recommended, 2024-2025
- Roma Tre University, Law Degree
- Rome
- Italian
- English

Amol Parikh
Amol Parikh is a trusted advisor and courtroom advocate focused on intellectual property litigation, counseling, and procurement. Known for his ability to translate complex technical issues into winning legal strategies, Amol combines deep engineering knowledge with extensive trial and appellate experience to deliver results that align with his clients’ business goals. His work has earned consistent recognition, including the International Law Office’s prestigious “Client Choice Award” for Intellectual Property in Illinois— an honor based solely on nominations from corporate counsel for exceptional client service and measurable business impact. Amol also serves as Local IP Litigation Practice Group Leader in McDermott’s Chicago office.
- Trial and appellate counsel for a leading power tool manufacturer in defensive patent infringement action involving six patents relating to powered nail guns, achieving complete non-infringement findings of all patents (Fed. Cir. and ITC)
- Trial counsel for a wood-pellet grill manufacturer in an offensive patent infringement case against competitor involving cloud connected technology, securing a final determination of infringement and remedial orders barring importation and sale of infringing products (ITC)
- Trial counsel for a cybersecurity company in high-stakes trade secret and non-compete litigation against a direct competitor, securing monetary and unique non-monetary relief on the eve of trial following three years of aggressive litigation across multiple forums (Cal.)
- Trial counsel for a computer networking industry company in a multi-patent case against a competitor, obtaining a favorable jury verdict, a permanent injunction and an order to destroy the defendant’s infringing product inventory (W.D. Wis.)
- Trial counsel for a leader in digital entertainment technology solutions in a high-value patent infringement enforcement campaign involving interactive program guide and parental control technology; securing over $50 million in settlements from multiple respondents (ITC and numerous district courts)
- Chambers USA, Intellectual Property, 2025-2026
- IAM Patent 1000 – The World’s Leading Patent Practitioners, 2023-2026
- Awarded the Asian American Bar Association (AABA) – Chicago’s 2020 Law Firm Partner Diversity Leadership Award, which honors substantial and lasting contributions to the legal profession, as well as the broader Chicago Asian-American community.
- Awarded International Law Office’s “2019 Client Choice Award” for Intellectual Property in Illinois. Client Choice recognizes those attorneys who provide “excellent client care.” Recipients are recognized for their ability to add real value to clients’ business above and beyond the other players in the market. Attorneys can only be nominated by corporate counsel.
- Recognized by Law & Politics as a Super Lawyer (2018-2019, 2022-2025) and Rising Star in Intellectual Property for five consecutive years (2011-2015)
- Leadership Council on Legal Diversity (LCLD)
- Asian American Bar Association of Chicago, board of directors
- South Asian Bar Association of Chicago
- Ravinia Associates, board of directors
- International Trademark Association, Trade Secrets Committee member
- DePaul University College of Law, JD
- Purdue University, BS, Electrical Engineering
- Illinois
- US District Court for the Northern District of Illinois (Trial Bar)
- US Court of Appeals for the Federal Circuit
- US District Court for the Eastern District of Texas
- US District Court for the Western District of Wisconsin
- US District Court for the Eastern District of Wisconsin
- US Patent and Trademark Office
- Supreme Court of Illinois
- English

Joseph Wasserkrug
Joseph (Joe) Wasserkrug focuses his practice on complex litigation matters, commercial arbitration, appeals, and healthcare regulatory matters. Joe represents clients across a variety of industries, with a particular focus on serving clients in the healthcare and private equity sectors, including health systems, hospitals, ambulatory surgery centers, physician and medical practices, and dental practices.
- Obtained a preliminary injunction in an employee poaching and breach of contract action for a physical therapy practice
- Obtained a favorable settlement in a payor dispute on behalf of a national anesthesiology practice
- Defeated a motion for preliminary injunction and subsequent appeal on behalf a behavioral health system
- Best Lawyers: Ones to Watch in America, Commercial Litigation, 2021-2026
- Bankruptcy Bar Association, member
- Dade County Bar Association, member
- University of Miami School of Law, JD, magna cum laude, Order of the Coif
- Ursinus College, BA
- Florida
- US Court of Appeals for the Eleventh Circuit
- US District Court for the Southern District of Florida
- US District Court for the Northern District of Florida
- US District Court for the Middle District of Florida
- US Bankruptcy Court for the Southern District of Florida

Gabriel L. Valdes
Gabriel L. Valdes focuses his practice on mergers, acquisitions, divestitures and venture capital investments and financings involving primarily private equity sponsors and their portfolio companies, and other private companies.
- Represented Validor Capital in its acquisitions of (1) The Marwin Company, an Ohio-based manufacturer of high-quality pressed steel products which provides critical parts for the manufacturing industry throughout the United States and across the world, and (2) The Boehm Pressed Steel Co., a South Carolina-based manufacturer of quality building specialties, including folding attic stairways, bi-fold doors, mirror bi-folds & by-pass units and pocket door frames
- Represented Capricorn Healthcare & Special Opportunities in its acquisitions of (1) Care Hospice, Inc., a provider of hospice care in Pennsylvania, Massachusetts, New Hampshire, Arkansas, South Carolina, New Jersey and Virginia, (2) Healthy Living at Home, a cooperative of 26 separately owned and operated home health and hospice companies across California, Oregon, Arizona and Nevada, and (3) Altruista Health, Inc., a health care technology company specializing in the design, development, implementation, and sale of population care management solutions and related software tools and data analytics
- Daily Business Review, Dealmaker, M&A, August 12, 2014
- Daily Business Review, Dealmaker, Finance, May 6, 2014
- University of Pennsylvania Law School, Kenneth W. Gemmill Prize for the best paper in the field of taxation
- University of Pennsylvania Law School, Distinguished Pro Bono Service Award
- Penn Club of Miami
- University of Pennsylvania Alumni Association
- University of Pennsylvania Law School, JD, Certificate in Business and Public Policy, summa cum laude
- Wharton School of the University of Pennsylvania, BBA
- Florida International University
- Florida
- English
- Spanish

Anthony N. Upshaw
Represents clients in product defense, class actions, mass tort litigation, and complex civil disputes
Leads high-stakes courtroom strategy and serves as trial counsel
Tony Upshaw delivers a long track record of courtroom success in product defense, class action, mass tort litigation, and complex civil disputes. He has tried more than 30 civil jury trials to verdict – experience that matters when the stakes are high.
- Serves as national trial counsel for Monsanto in polychlorinated biphenyls (PCB) litigation and Glyphosate (Roundup) litigation
- Served with others on the McDermott team as national coordinating counsel for Honeywell International’s Bendix asbestos docket
- Served as lead counsel for R.J. Reynolds Tobacco Company in the individual follow-up cases to the national flight attendant class action lawsuit against the tobacco industry
- Represented a major oil company in pending benzene exposure litigation in Florida and New Jersey
- Defends major companies in products liability class actions, including pharmaceutical, asbestos, and pollution claims
- The Best Lawyers in America, Lawyer of the Year in Miami: Mass Tort Litigation / Class Actions – Defendants, 2027
- The Best Lawyers in America, Product Liability Litigation – Defendants (2023-2027), Mass Tort Litigation / Class Actions – Defendants, 2026-2027
- Legal 500 US, 2020-2025
- Lawyers of Color, Power list, 2023
- Chambers USA, Product liability: Toxic Torts, Band 1 2023-2026
- 11th Circuit Court Committee on Professionalism
- McDermott Will & Schulte Justice, Diversity, Equity & Inclusion Committee, global head
- McDermott Will & Schulte Executive Committee, member
- McDermott Will & Schulte Management Committee, member
- University of Miami School of Law, JD
- United States Coast Guard Academy, BS
- District of Columbia
- Florida
- US Court of Appeals for the Eleventh Circuit
- US District Court for the Middle District of Florida
- US District Court for the Northern District of Florida
- US District Court for the Southern District of Florida
- US District Court for the Eastern District of Wisconsin
- English

Philip Tingle
Philip (Phil) Tingle represents energy companies such as utilities, independent power producers, developers and financial institutions on a wide range of energy tax-related matters. He is the global co-head of the Firm’s Energy & Project Finance Group.
Phil continues to be leader with respect to the implementation of the Inflation Reduction Act (the “IRA”) and the related incentives, tax credits and technologies. Phil provides advice regularly regarding all aspects of renewable-energy projects, including advice related to prevailing wage and apprentice, energy community adders, domestic content, project tax credit qualification, tax equity structures, financings, acquisitions and dispositions, restructurings and workouts. He has extensive experience with all technologies including wind (sections 45 and 45Y), solar (sections 48 and 48E), storage (sections 48 and 48E), nuclear (section 45U), renewable natural gas (sections 48 and 45Z), manufacturing (sections 45X and 48C), hydrogen (section 45V), carbon sequestration (section 45Q) and EV (sections 30B, 30C, 30D, 45W and 48C). Phil continues to work with client selling and buying federal and state tax credits and working with clients with the direct pay provisions pursuant to the IRA.
- Advised an energy investor in the tax equity financing of a 235-mile 500 kV electric transmission line project
- Advised a major investment bank in the tax aspects of a ground-breaking securitization involving solar energy assets across the United States
- Represented an international financial services company in the legal due diligence, negotiation and preparation of transaction documents relating to their tax equity investment in a residential solar portfolio
- Chambers USA, Projects: Renewables & Alternative Energy, 2022-2026
- Legal 500 US, Recommended, 2022-2025
- University of Florida Levin College of Law, LLM
- University of Florida Levin College of Law, JD, with honors
- Tulane University, BSM
- Florida
