Charles (Charlie) McMahon focuses his practice on patent, trademark, copyright and unfair competition law. Charlie has represented domestic and multinational clients in federal courts and before the US Patent and Trademark Office, the US Patent Trial and Appeal Board (PTAB), the International Trade Commission (ITC), the US Court of Appeals for the Federal Circuit and the US Supreme Court.
- InterDigital v. ZTE (D. Del. 2015); led a trial team to a favorable defense jury verdict in this case involving wireless communication technology
- ZTE v. InterDigital (PTAB 2015); served as lead counsel in a successful inter partes review proceeding, in which the Patent Trial and Appeal Board cancelled claims that had previously survived a jury validity verdict
- Technology Properties Limited v. ZTE (N.D. Cal. 2015); defended a manufacturer of wireless communication devices in this patent infringement action, which resulted in a favorable claim construction ruling and a stipulation of non-infringement
- The Legal 500, 2017 to present
- The Best Lawyers in America, Patent Litigation, 2024
- American Bar Association, Intellectual Property Law Section
- American Intellectual Property Law Association
- Licensing Executives Society
- George Washington University Law School, JD, Electrical Engineering
- University of Notre Dame, BS
- Illinois
- Minnesota
- Supreme Court of the United States
- US Court of Appeals for the Federal Circuit
- US District Court for the Northern District of Illinois
- US District Court for the Eastern District of Michigan
- US District Court for the Western District of Michigan

Marjorie C. Soto Garcia
Marjorie C. Soto Garcia provides strategic advice to employers of all sizes – from Fortune 100 companies to startups – on the full spectrum of labor union and organizing matters, class action employment litigation, and workplace compliance issues. She advises organizations across many industries, including healthcare, private equity, technology, energy, food service, logistics, retail, media, entertainment, and hospitality.
- Secured multiple collective bargaining agreements for a tech and media company
- Secured dismissals and withdrawals of multiple unfair labor practice charges, including novel challenges to operational decisions, for a tech and media company
- Secured complete dismissals of unfair labor practice charges before the National Labor Relations Board (NLRB) for an international client
- Best Lawyers: Ones to Watch in America, Labor and Employment Law – Management, 2026
- Top Lawyers Under 40 Award, Hispanic National Bar Association, 2022
- UCLA Law Women LEAD, Board of Directors
- Stanford Professional Women of Los Angeles, Board of Directors
- Law360 Employment Authority Labor Editorial Advisory Board, 2024
- University of California, Los Angeles School of Law, JD
- Stanford University, BA
- California
- US Court of Appeals for the Ninth Circuit
- US District Court for the Northern District of California
- US District Court for the Southern District of California
- US District Court for the Central District of California
- US District Court for the Eastern District of California
- Englisch
- Deutsch
- Spanish

Erika Mayshar
Erika Mayshar advises foundations, hospitals and health systems, public charities and other tax-exempt organizations navigating complex legal and tax issues. She works closely with prominent philanthropists and nonprofits across the United States to accomplish major corporate and charitable transactions, coordinate sophisticated tax planning and maximize philanthropic impact. She also works with private equity firms, investment management firms and closely held companies engaging in innovative business relationships with the nonprofit sector, managing tax-exempt investments or expanding corporate sustainability initiatives.
- Advised private foundations and philanthropists on strategic grantmaking, venture philanthropy, impact investing, complex family office structures, donor advised funds, and succession planning
- Assisted corporate foundations in developing successful models for philanthropy, including employee assistance funds, disaster relief, research grant programs and corporate social responsibility initiatives
- Represented nonprofit hospitals and health systems in joint ventures and affiliations with for-profit and nonprofit healthcare organizations, tax-exempt bond financings, acquisitions, conversions, innovation structures, Section 501(c)(3) tax exemption matters and Section 501(r) compliance
- The Best Lawyer, Nonprofit / Charities Law, Los Angeles, 2021 to 2024
- The Best Lawyer, Healthcare Law, Los Angeles, 2022 to 2024
- Legal 500 United States, 2018
- California State Bar Association, University of California Irvine School of Law, University of California Irvine School of Business and American Management Association, lecturer
- New York University Institute on Federal Taxation, American Bar Association, The Bond Buyer, American Health Law Association and Health Care Compliance Association, writer
- University of Southern California Tax Institute, past planning committee member
- American Health Lawyers Association, member
- Stanford Law School, JD, magna cum laude
- Pomona College, BA
- California

Jane Wells May
Jane Wells May focuses her practice on state and local tax matters. She represents businesses in connection with tax controversies at the audit, administrative and judicial levels around the United States. Her clients include companies in manufacturing, retailing, pharmaceuticals, financial services, agribusiness, food and beverage, health care, energy, technology and insurance industries. Jane has served on the Firm’s Management and Compensation Committees, on the Executive Committee and as the global head of the Firm’s Tax Practice.
- Serves as national coordinating counsel to several Fortune 500 companies to provide strategic counsel and audit defense on all state and local tax matters across the country, including litigating in administrative and judicial venues when necessary
- Secured a complete concession prior to trial on a cost of performance apportionment income tax issue for a financial services company
- Won a transfer pricing case for a shared services entity in New York
- Best Lawyers in America, Tax Law, 2016-2026
- International Tax Review, World Tax, 2016-2026
- Chambers USA, Tax: Controversy, Band 2, 2008-2025
- Legal 500 US, Leading Lawyer in US Taxes: Contentious, 2020-2024
- Thomson Reuters, Stand-out Lawyer – independently rated lawyers, 2025-2026
- Chicago Bar Association, State and Local Tax Committee
- State of Illinois, Director’s Advisory Group
- Vanderbilt University Law School, JD, Order of the Coif
- Wittenberg University, BA, with honors
- District of Columbia
- Illinois
- Supreme Court of the United States

Adam R. Marks
Adam R. Marks focuses his practice on representing hospitals, health systems, and other health industry providers and investors in transactional matters, including mergers, acquisitions, affiliations and joint ventures. Adam also provides guidance to hospital, health system and physician clients on a wide range of regulatory matters such as physician contracting, compliance with Stark Law, licensure and accreditation, Medicare and Medicaid enrollment, and Health Insurance Portability and Accountability Act (HIPAA) compliance. He also counsels clients in various health information technology matters, including those related to software vendor contracting and negotiation.
- Assisted with the $475 million leveraged acquisition of a health system covering multiple states by a for-profit joint venture
- Assisted with the acquisition of an acute care hospital on behalf of a nonprofit health system
- Assisted with the merger of three hospice and palliative care agencies, creating the largest provider in the state
- American Health Lawyers Association
- Illinois Association of Healthcare Attorneys
- Loyola University Chicago School of Law, JD, magna cum laude
- Northwestern University, BA
- Illinois
Lisa K. Loesel
Lisa Loesel focuses her practice on employee benefits matters, including the design, amendment and administration of pension and 401(k) plans, nonqualified deferred compensation arrangements, and employee stock ownership plans. She counsels privately and publicly held corporations regarding the employee benefits design and transition matters arising from corporate mergers, acquisitions and divestitures. She also advises clients regarding fiduciary and plan investment issues under the Employee Retirement Income Security Act of 1974 (ERISA). Lisa also has experience counseling plan fiduciaries with respect to the claims and appeals procedures under ERISA.
- Structured a 401(k) plan spin-off with complex company stock fund issues required to facilitate the client’s divestiture of a business segment valued at $2.1 billion
- Advised on real estate investment trust (REIT) transaction issues pertaining to a company stock fund and leveraged employee stock ownership plan (ESOP) fund, for a client conducting an REIT spin-off
- Advised clients on strategies for reducing pension liabilities, including hard plan freezes, soft plan freezes, plan terminations, implementation of permanent lump sum distribution features and lump sum distribution windows
- Chambers USA, Employee Benefits & Executive Compensation, 2024
- Best Lawyers in America, Employee Benefits (ERISA) Law, Chicago, 2023–2025
- Legal 500 US, 2019, 2022–2024
- University of Michigan Law School, JD
- Yale University, BA
- Illinois

Agnieszka Kawecki
Agnieszka Kawecki focuses her practice on all aspects of estate planning. Agnes advises high-net-worth individuals and families on wealth transfer planning, estate, gift, and generation-skipping transfer tax issues, estate administration and charitable planning. Her practice includes drafting customized estate plans, designing and implementing wealth transfer techniques, formation and administration of private foundations and post-death estate administration matters.
- Wills for Heroes Foundation
- Ladder Up Tax Assistance Program
- Chicago Bar Association
- Northwestern Pritzker School of Law, JD, cum laude
- Saint Xavier University, BA, summa cum laude
- Illinois
- Englisch
- Polish

Katie C. Gose
Katie C. Gose’s practice focuses on estates, trusts and tax planning for high-net-worth clients. She has experience drafting and administering dynasty trusts, supervising trust administrations, preparing federal estate and gift tax returns and working with private foundations.
- Best Lawyers in America, Ones to Watch, Trusts and Estates, 2022 to 2025
- Harvard Law School, JD, cum laude
- Princeton University, BA, magna cum laude
- California

Jon Dean
Jon Dean is the Head of the Los Angeles Litigation Practice. He focuses his practice on complex commercial litigation matters, including patent and trade secrets cases, antitrust actions, securities matters, unfair competition cases, trademark disputes, employment actions, OSHA cases and healthcare matters. Jon is a former prosecutor and an experienced trial lawyer, having served as trial counsel on both civil and criminal cases.
Some of Jon’s noteworthy cases include the following:
- Trial counsel and lead appellate counsel for the defendant, a leading maker of office headsets and videoconferencing products, in connection with a trade secret misappropriation action; in a sweeping published opinion entered shortly before trial, the court granted summary judgment in favor of the defendant (US District Court for the Northern District of California (2019-2023); Ninth Circuit Court of Appeals (2023))
- Trial counsel and lead appellate counsel for the defendant, a major on line short term rental (STR) platform, on a landmark California Coastal Act matter in which the plaintiff seeks a state-wide injunction concerning all STRs located within California’s 1,100 mile long coastal zone; after oral argument on defendant’s demurrer, the matter was dismissed by the trial court and was subsequently unanimously affirmed by a published opinion of the court of appeal; the matter is currently pending with the California Supreme Court (California Superior Court, Los Angeles County (2021); California Court of Appeal (2022-2023); California Supreme Court (2023-present))
- Trial counsel and lead appellate counsel for the defendant, a well-known luxury candy company, in connection with an unfair competition and trademark misappropriation action; immediately before trial the court summarily adjudicated all claims in favor of the defendant primarily on the grounds of genericness and damages; the matter is currently pending on appeal (US District Court for the Central District of California (2018-2023); Ninth Circuit Court of Appeals (2023-present))
- Legal 500 US, 2020-2024
- Best Lawyers in America, Healthcare Law, 2021-2025
- Daily Journal, Leading Commercial Litigator, 2024
- Benchmark Litigation, 2009-2023
- Chambers USA, Litigation: White-Collar Crime & Government Investigations, 2021
- McDermott Los Angeles Pro Bono Committee, current chair
- Western Justice Center, past member of the board of directors
- Legal Aid Foundation of Los Angeles, past member of the board of directors
- University of California, Berkeley School of Law, JD
- University of California, Los Angeles, BA
- California
- US Court of Appeals for the Second Circuit
- US Court of Appeals for the Third Circuit
- US Court of Appeals for the Ninth CircuitUS Court of Appeals for the Federal Circuit
- US District Court for the District of Arizona
- US District Court for the Central District of California
- US District Court for the Northern District of California
- US District Court for the Southern District of California
- US District Court for the District of Colorado
- US District Court for the District of Delaware
- US District Court for the Middle District of Florida
- US District Court for the District of Idaho
- US District Court for the District of South Carolina
- US District Court for the Eastern District of Texas
- US District Court for the Northern District of Texas
- US District Court for the Western District of Texas

Stefanie Soltwedel
Stefanie Soltwedel verfügt über rund 15 Jahre Erfahrung in der strategischen Führung wirtschaftsrechtlicher Streitigkeiten und der Gestaltung komplexer Vertragsbeziehungen. Sie berät nationale wie internationale Unternehmen bei der Ausgestaltung, Verhandlung und Umsetzung komplexer wirtschaftsrechtlicher Verträge sowie bei der Durchsetzung und Abwehr daraus resultierender Ansprüche. Ein besonderer Schwerpunkt ihrer Tätigkeit liegt auf langfristigen und wirtschaftlich sensiblen Vertragsbeziehungen, insbesondere bei Anlagenbau-, Liefer-, Einkaufs-, Vertriebs-, Logistik- und Dienstleistungsverträgen.
Sie vertritt Mandanten vor staatlichen Gerichten und begleitet sie ebenso bei der außergerichtlichen Streitbeilegung in nationalen und grenzüberschreitenden wirtschaftsrechtlichen Auseinandersetzungen. Ihre Erfahrung umfasst insbesondere komplexe Schadensersatz-, D&O- und Vertragsstreitigkeiten, immobilienbezogene Auseinandersetzungen sowie Konflikte an der Schnittstelle von operativem Geschäft und strategischen Unternehmensentscheidungen. Mandanten schätzen insbesondere ihre Fähigkeit, auch in hochkomplexen und festgefahrenen Situationen belastbare Handlungsoptionen zu entwickeln, Prozessrisiken präzise zu bewerten und wirtschaftlich überzeugende Lösungen zu erarbeiten. Ein besonderer Fokus ihrer Tätigkeit liegt auf der strategischen Vorbereitung und Führung von Vergleichsverhandlungen, Mediationen und anderen Formen alternativer Streitbeilegung mit dem Ziel, für ihre Mandanten tragfähige und wirtschaftlich vorteilhafte Ergebnisse zu erreichen.
Zu ihrem Mandantenkreis zählen insbesondere Unternehmen aus der Automobil-, Handels-, Konsumgüter-, Industrie-, Immobilien- und Finanzbranche. Darüber hinaus berät sie HNWIs und Family Offices.
Stefanie Soltwedel beriet unter anderem:
- ein führendes deutsches Unternehmen im Bereich der Automobilentwicklung bei der Abwehr möglicher Ansprüche eines chinesischen Automobilherstellers im Zusammenhang mit einem Entwicklungsprojekt sowie bei der Verhandlung einer wirtschaftlich vorteilhaften außergerichtlichen Gesamtlösung;
- den Aufsichtsratsvorsitzenden eines börsennotierten deutschen Unternehmens bei der erfolgreichen gerichtlichen Abwehr einer Schadensersatzklage in einem langjährigen D&O-Rechtsstreit im Zusammenhang mit einem Aktienverkauf;
- ein Unternehmen der Spezialchemie bei der Verhandlung komplexer Liefer-, Anlagenbau- und Gasversorgungsverträge sowie bei der strategischen Beratung zur Absicherung kritischer Liefer- und Produktionsprozesse;
- ein deutsches Family Office bei der gerichtlichen Verteidigung gegen Schadensersatzansprüche im Zusammenhang mit einer Immobilientransaktion, einschließlich der strategischen Begleitung komplexer Sachverständigenfragen;
- einen Zahlungsdienstleister in einer komplexen außergerichtlichen Auseinandersetzung mit einer Bank über behauptete Schadensersatzansprüche sowie bei der Herbeiführung einer wirtschaftlich vorteilhaften Einigung;
- ein hochspezialisiertes Produktionsunternehmen bei der Durchsetzung von Schadensersatzansprüchen im Zusammenhang mit einem großvolumigen Anlagenbauprojekt im Rahmen eines Mediationsverfahrens;
- einen deutschen Warenhauskonzern bei der Gestaltung und Verhandlung komplexer Lager-, Speditions- und Logistikverträge mit einem neuen Logistikpartner unter erheblichem Zeitdruck.
- Handelsblatt/Best Lawyers™, „Ones to Watch“ in Deutschland: Konfliktlösung, 2024-2025
