Job Title Category: Partner

  • Aymen Mahmoud

    Aymen Mahmoud

    People

    Aymen Mahmoud

    Partner

    London – 22 Bishopsgate

    Areas of focus

    Complex debt financing

    Direct lending and leveraged buyouts

    Cross-border syndicated, second lien and mezzanine lending

    Restructurings and distressed debt

    Pre-EBITDA and recurring revenue financings

    Aymen Mahmoud is a London-based partner who serves as European Head of Finance and Managing Partner of the firm’s London office. He also co-heads both the London Transactions Group and the London Finance, Restructuring and Special Situations Group.

    He advises private equity funds and their portfolio companies, hedge funds, corporate borrowers and issuers, banks, direct lenders, family offices and other sophisticated capital providers on complex debt financing transactions.

    His award-winning practice spans direct lending, leveraged buyouts, syndicated senior, second lien and mezzanine lending, distressed debt trading, portfolio acquisitions, restructurings, high-yield debt offerings and recurring revenue financings. He also played a key role in establishing Loan Market Association forms for leveraged and high-yield documentation.

    “Aymen is one of the standout partners in this space. He combines exceptional technical ability with deep market knowledge and strong commercial judgement. He is highly responsive, calm under pressure and consistently focused on achieving practical outcomes.”

    Chambers UK, Leveraged Finance:

    Mid-Market, 2027

    Recognized in

    Recognized in

    Financial Times Innovative Lawyers Europe, 2025

    Ranked in

    Ranked in

    Legal 500 UK, 2025-2026

    Ranked in

    Ranked in

    Chambers UK, 2023-2026

    Results
    • Advised Barings on its financing of Zenchef and CoverManager
    • Advised Oaktree Capital on its financing of Biomedica plc.
    • Advised a European B2B SaaS borrower on an adjusted recurring revenue financing
    • Represented the issuers in connection with the Greensill securitization programme
    • Represented OpenGate Capital in connection with a dividend recapitalization

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    Recognitions
    • Financial Times Innovative Lawyers Europe, Standout for Practice of Law: Private Finance, 2025
    • The Best Lawyers in the United Kingdom, Capital Markets Law, 2023-2025
    • Legal 500 UK, Leading Partner, Acquisition Finance, 2025-2027
    • Legal 500 UK, Recommended, Corporate Restructuring and Insolvency, Bank Lending: Investment Grade Debt and Syndicated Loans, 2022-2027, Private Equity: Transactions – Mid-Market Deals (Up to £500m), 2026-2027
    • Chambers UK, Leveraged Finance: Mid-Market, 2023-2027

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    Capabilities and industries
    Regional markets
    Community
    • European Head of Finance
    • Co-Head, London Transactions Group
    • Co-Head, London Finance, Restructuring and Special Situations Group
    • Managing Partner, London office
    Credentials
    Education
    • Nottingham Law School, LPC
    • University of Warwick, LLB
    Admissions
    • England & Wales
  • Richard D. Diggs

    Richard D. Diggs

    People

    Richard D. Diggs

    Partner

    New York – One Vanderbilt Avenue

    Areas of focus

    Richard D. Diggs focuses his practice on commercial litigation. He is experienced in litigating a myriad of disputes including ERISA, securities, and commercial contract cases in federal and state courts.

    Prior to joining McDermott Will & Schulte, Richard gained experience working as an associate in a global law firm in New York, as well as clerking for the Honorable James E. Graves Jr. in the US Court of Appeals for the Fifth Circuit and the Honorable Denise Page Hood in the US District Court for the Eastern District of Michigan.

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    Results
    • Represented a large health insurance company in a lawsuit against a for-profit health system for misrepresentations and breach of contract; after four-week arbitration and post-hearing briefing, the case settled favorably in global resolution of other disputes.
    • Obtained complete victory on behalf of a large health insurance company against multiple hospitals alleging that the company underpaid out-of-network emergency services claims.
    • Representing a large health insurance company against a group of chiropractors alleging various violations of ERISA.

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    Recognitions
    • Best Lawyers: Ones to Watch in America, Corporate Governance and Compliance Law (2024,2027), Commercial Litigation, Securities Regulation, 2026-2027
    Capabilities and industries
    Regional markets
    Community
    Credentials
    Education
    • New York University School of Law, JD, May 2012
    • Wayne State University, BA, cum laude
    Admissions
    • New York
    Courts/Agencies
    • US Court of Appeals for the Fifth Circuit
  • Michael Murray

    Michael Murray

    People

    Michael Murray

    Partner

    New York – One Vanderbilt Avenue

    Areas of focus

    Michael Murray’s litigation practice includes commercial matters, bankruptcies, class actions, and other complex litigations in federal and state courts, arbitration proceedings, and appeals. He represents clients in a variety of sectors, including healthcare, financial services, and private equity.

    Michael also maintains an active pro bono practice, representing foreign nationals seeking asylum protection in the United States due to homophobia and hate crimes in their home countries. He has also represented indigent clients in criminal appeals and habeas petitions.

    Prior to joining McDermott Will & Schulte, Michael worked in global law firms and financial services companies in New York and Tokyo.

    Results
    • Represents a health insurer in a series of putative class actions alleging ERISA, antitrust, RICO, and state law violations regarding the health insurer’s payment practices, plan interpretation, and use of specialty networks
    • Represented major health insurer in a number of arbitration disputes brought by one of the largest for-profit hospital systems in the nation alleging underpayment of contracted healthcare claims; after multiple multi-week arbitration hearings and post-hearing briefing, leveraged favorable results to ultimately drive a global resolution of pending arbitrations.

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    Recognitions
    Capabilities and industries
    Regional markets
    Community
    Credentials
    Education
    • New York University School of Law, JD
    • Yale University, BA
    Admissions
    • New York
    Courts/Agencies
    • US District Court for the Eastern District of New York
    • US District Court for the Southern District of New York
    Languages
    • English
    • Japanese
  • Chelsea Cosillos

    Chelsea Cosillos

    People

    Chelsea Cosillos

    Partner

    New York – One Vanderbilt Avenue

    Areas of focus

    Chelsea Cosillos is a litigator who focuses her practice on complex commercial matters in federal and state courts and arbitration proceedings, including class action and appellate cases.  Across a variety of industries, she has represented clients in disputes involving ERISA, antitrust, fraud, breach of contract, product liability, breach of fiduciary duty, and securities claims.

    Chelsea also maintains an active pro bono practice, with an emphasis on immigration and criminal appeal matters.

    Results
    • Representing a major health insurer in a variety of matters, including cases involving ERISA, fraud, breach of contract, and antitrust claims.
    • Obtained complete victory on behalf of a major health insurer against multiple hospitals alleging improper reimbursement of certain out-of-network emergency services claims; successfully narrowed the hospitals’ causes of actions through multiple rounds of motions to dismiss and defeated the hospitals’ remaining statutory claim at summary judgment on the eve of an anticipated two-week federal jury trial in the Southern District of Florida.

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    Recognitions
    • Empire State Counsel Program Honoree, 2018
    Capabilities and industries
    Regional markets
    Community
    Credentials
    Education
    • Harvard Law School, JD
    • Arizona State University, BS, summa cum laude
    Admissions
    • New York
  • Richard W. Nicholson Jr.

    Richard W. Nicholson Jr.

    People

    Richard W. Nicholson Jr.

    Partner

    New York – One Vanderbilt Avenue

    Areas of focus

    Richard Nicholson focuses his practice on complex commercial litigation in federal and state courts across the country and also represents clients in arbitrations and mediations.  He has a particular emphasis on healthcare litigation, and has experience representing clients in disputes involving claims payment, ERISA, RICO, and Sherman Act issues. His other work includes representing clients in disputes involving the securities laws, breach of contract, breach of fiduciary duty, business appraisal, product liability, and consumer protection statutes.

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    Results
    • Represented a leading health insurer in a long-running ERISA case in which a provider alleged that the insurer improperly calculated the reimbursement of certain out-of-network claims; defeated all of provider’s claims following a two-week bench trial*
    • Represented a leading health insurer in successful, precedent-setting ERISA appeal to the Fifth Circuit that reversed district court’s award damages to out-of-network hospital*
    • Represented software and claims processing company and private equity fund in statutory appraisal action brought by hedge funds; prevailed after five-day bench trial*

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    Recognitions
    • Best Lawyers: Ones to Watch in America, Commercial Litigation, 2026
    Capabilities and industries
    Regional markets
    Community
    Credentials
    Education
    • Fordham University School of Law, JD, magna cum laude, Order of the Coif
    • Brown University, BA
    Admissions
    • New York
    • New Jersey
    Courts/Agencies
    • US District Court for the Southern District of New York
    • US District Court for the District of Colorado
  • John J. Song

    John J. Song

    People

    John J. Song

    Partner

    New York – One Vanderbilt Avenue

    Areas of focus

    John J. Song is a litigator who represents clients in general commercial matters, as well as class actions and other complex litigations spanning federal and state courts, arbitration proceedings and appeals across the country. His matters have spanned a variety of industries, with a focus on healthcare, consumer products and private equity.

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    Results
    • Defeated a case brought against a crypto over-the-counter (OTC) desk, alleging that it facilitated crypto trades in connection with a pig butchering scheme. The court held “the documents support the position that [the crypto OTC desk] operate[s] a legitimate business and had implemented anti-money laundering policies and practices during all relevant times.”
    • Representing a major health insurer in a variety of matters, including arbitration of disputed contract terms, as well as cases involving ERISA, fraud, breach of contract and antitrust claims
    • Representing a leading health insurer against multiple hospitals alleging improper reimbursement of certain out-of-network emergency claims in Florida federal court

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    Recognitions
    • Best Lawyers: Ones to Watch in America, Appellate Practice, Commercial Litigation, 2023-2026
    • Super Lawyers, Rising Stars, 2023-2024
    Capabilities and industries
    Regional markets
    Community
    Credentials
    Education
    • Georgetown University Law Center, JD
    • Yale University, BA, Political Science & BA, International Studies
    Admissions
    • New York
    Courts/Agencies
    • US District Court for the Eastern District of New York
    • US District Court for the Northern District of New York
    • US District Court for the Southern District of New York
    Languages
    • English
    • Chinese (Mandarin)
  • Caroline Incledon

    Caroline Incledon

    People

    Caroline Incledon

    Partner

    New York – One Vanderbilt Avenue

    Areas of focus

    Caroline Incledon focuses her practice on litigating complex commercial disputes before state and federal courts, focusing principally on representing clients in the financial services and healthcare industries. Among other areas of law, Caroline has handled disputes involving breach of contract, ERISA, securities fraud, antitrust, and civil RICO claims. Caroline also maintains an active pro bono practice, representing pro bono clients in family law matters.

    While in law school, Caroline was on the editorial board of the American Criminal Law Review and authored a note selected for publication.

    Results
    • Representing a leading health insurer in several matters alleging ERISA, antitrust, RICO, and state law violations based on the health insurer’s payment practices
    • Won dismissal of class action complaint against health insurer by out-of-network providers alleging RICO, antitrust, and various state law claims
    • Won dismissal with prejudice of complaint against an online review platform filed by a putative nationwide class, alleging breach of contract and deceptive business practices
    • Obtained favorable ruling on class certification in purported class action against financial institution alleging antitrust violations*
    • Obtained affirmance of dismissal of securities fraud claims brought by a purported class of shareholders regarding the effectiveness of financial institutions’ internal controls*

    *Matter handled prior to joining the firm

    Recognitions
    Capabilities and industries
    Regional markets
    Community
    • American Bar Association
    • Society of Irish American Lawyers
    Credentials
    Education
    • Georgetown University Law Center, JD
    • Tufts University, BA, magna cum laude
    Admissions
    • New York
    Courts/Agencies
    • US Court of Appeals for the Second Circuit
    • US District Court for the Eastern District of New York
    • US District Court for the Southern District of New York
  • Abigail M. Kagan

    Abigail M. Kagan

    People

    Abigail M. Kagan

    Partner

    New York – One Vanderbilt Avenue

    Areas of focus

    Abigail M. Kagan is an experienced labor and employment advisor on matters ranging from day-to-day human resources (HR) counseling to complex transaction strategy. Abigail’s practice balances  regulatory compliance with tangible short- and long-term goals. This includes internal investigations, executive contracts, Family and Medical Leave Act (FMLA)  and Americans with Disabilities Act (ADA) disability accommodations, discrimination and harassment, industry-tailored personnel policies, wage and hour audits, reductions in force, workplace health and safety, workplace violence, employee mobility and non-compete enforcement, gig workers, and workforce integration and rebadging.

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    Results
    • Represented Early, Cassidy & Schilling, LLC in its sale to AssuredPartners Inc.
    Recognitions
    • Best Lawyers: Ones to Watch in America, Labor and Employment Law – Management, 2026-2027
    • Super Lawyers Rising Star, 2020-2026
    • Legal 500 US, 2022
    Capabilities and industries
    Regional markets
    Community
    Credentials
    Education
    • Columbia Law School, JD, Harlan Fiske Stone Scholar
    • Columbia University, MPH
    • Columbia University, BA
    Admissions
    • New York
    Courts/Agencies
    • US District Court for the Eastern District of New York
    • US District Court for the Southern District of New York
  • Jennifer M. Mikulina

    Jennifer M. Mikulina

    People

    Jennifer M. Mikulina

    Partner
    Areas of focus

    Advises clients on trademark and copyright counseling, licensing, prosecution, and enforcement

    Helps companies register, maintain, protect, and license trademarks, service marks, domain names, and other brand assets worldwide

    Supports business-focused IP planning for transactions, including strategic alliances, joint ventures, M&A, and complex IP license structures

    Advises on data-licensing issues, including for clients operating in the digital health space

    Jennifer M. Mikulina is the co-head of McDermott Will & Schulte’s global Intellectual Property (IP) Group and focuses her practice on trademark and copyright counseling, licensing, prosecution, and enforcement. She works with clients to develop comprehensive, business-aligned strategies to protect and maximize the value of their brands.

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    “Excellent listener and problem solver with a unique ability to break down complex IP concepts into bite-sized, manageable pieces.”

    Client testimonial, World Trademark Review

    Ranked in

    Ranked in

    Chambers USA 2025

    Ranked in

    Ranked in

    Legal 500 US 2025

    Ranked in

    Ranked in

    Super Lawyers 2025

    Results
    • Advised clients on IP ownership and licensing structures in connection with tax-based restructurings and post-acquisition integrations
    • Counseled clients in various industries on developing IP policies
    • Advised multinational corporations on IP matters related to restructurings, acquisitions, dispositions, joint ventures, post-acquisition integrations, and internal reorganizations
    • Counseled companies around the world in the selection, clearance, and protection of trademarks
    • Worked with clients and US Customs and Border Protection officers on the seizure of counterfeit goods

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    Recognitions
    • The Best Lawyers in America, Lawyer of the Year in Chicago: Trademark Law, 2027
    • Chambers USA, Intellectual Property, 2020-2026
    • Legal 500 US, 2016-2025
    • Super Lawyers, Top 50: Women Illinois Super Lawyers, 2022-2025
    • Super Lawyers, 2018-2025

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    Capabilities and industries
    Regional markets
    Community
    • International Trademark Association (INTA), Leadership Development Committee
    • Lawyers for the Creative Arts, Board of Directors, vice president
    • McDermott Will & Schulte Intellectual Property Group, co-head

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    Credentials
    Education
    • University of Wisconsin Law School, JD
    • University of Wisconsin–Madison, BS, with honors
    Admissions
    • Illinois
    • Wisconsin
    Courts/Agencies
    • US District Court for the Northern District of Illinois
    • US District Court for the Western District of Wisconsin
    Languages
    • English
  • Smith Alpert

    Smith Alpert

    People

    Smith Alpert

    Partner

    New York – One Vanderbilt Avenue

    Areas of focus

    Smith Alpert focuses his practice on representing private equity sponsors and their portfolio companies as well as other private companies in complex business transactions, including mergers, acquisitions and divestitures, leveraged buyouts, cross-border transactions, corporate carve-outs, joint ventures, minority investments, financings, reorganizations and complex corporate governance matters.

    Smith also provides clients with day-to-day general corporate advice and counsel on business operations, including employment matters, equity compensation, commercial contracts and confidentiality agreements.

    While in law school, Smith was a contributor to the Georgetown Journal of Law & Public Policy.

    Results
    • Represented Nautic Partners in numerous transactions, including:
      • Its acquisition of Harrington Industrial Plastics, a leading distributor of piping and other engineered fluid process products, from Aliaxis and subsequent sale to Bain Capital
      • Its sale of Spartech, a leading custom manufacturer of specialized acrylics and other extruded plastics, to TJC
      • Its investment in SPS Health, a leading value-based care solutions provider serving post-acute pharmacies and pharmacy benefit managers (PBMs)
      • Its sale of Canada Cartage, the leading short-haul trucking and logistics business in Canada, to Mubadala Capital

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    Recognitions
    • Super Lawyers, Rising Stars, Top Rated Mergers & Acquisitions Attorney in New York, 2024
    • New York State Courts Office for Justice, Certificate of Distinguished Service
    • Best Lawyers: Ones to Watch in America, Corporate Law, Leveraged Buyouts and Private Equity Law, Mergers and Acquisitions Law, 2026-2027
    Capabilities and industries
    Regional markets
    Community
    • St. Anthony Trust of Hartford, member, board of directors
    Credentials
    Education
    • Georgetown University Law Center, JD
    • Trinity College, BA
    Admissions
    • New York