Allyson C.Werntz (Ally)


Chicago + 1.312.269.4322

Ally Werntz represents and counsels employers in a variety of complex labor management relations issues and employment litigation matters. Ally primarily focuses her practice on labor relations, including collective bargaining, union organizing, representation proceedings, grievance and arbitration proceedings, and unfair labor practice proceedings arising under the National Labor Relations Act (NLRA). She also assists in representing employers in employment litigation matters involving disputes brought under various federal and state laws, including Title VII of the Civil Rights Act, the Age Discrimination in Employment Act (ADEA), and wage and hour laws. Additionally, Ally counsels employers regarding compliance with labor and employment laws and advises on labor and employment aspects of business transactions, including mergers and acquisitions.

Ally represents clients in a variety of industries, including manufacturing, health care, financial services, technology, automotive, railroad, and construction. She has represented manufacturing companies as the first chair lawyer in National Labor Relations Board (NLRB) unfair labor practice hearings and in labor arbitrations.

In addition to her labor and employment practice, Ally, a former AmeriCorps volunteer, continues to follow her passion for public service by maintaining an active pro bono practice by, among other things, providing advice to nonprofit organizations and representing immigrants seeking asylum in the United States.


  • Coalition of railroads achieve successful results in national collective bargainingJones Day was counsel for the U.S. railroad industry in one of the largest and most consequential labor matters of 2022, helping to avoid threatened work stoppages by 100,000 workers that would have gravely imperilled the U.S. economy and drew the personal attention of President Biden.
  • Wabtec and GE Transportation merge in $11.1 billion transactionJones Day advised Wabtec Corporation in a Reverse Morris Trust merger with GE Transportation, valued at $11.1 billion.
  • Alpha Natural Resources plan confirmed by U.S. Bankruptcy CourtOn July 12, 2016, the United States Bankruptcy Court for the Eastern District of Virginia entered an order confirming the Second Amended Joint Plan of Reorganization of Alpha Natural Resources, Inc. and 148 of its debtor affiliates, less than one year after Alpha, one of the largest coal companies in the United States, entered chapter 11 with liabilities of approximately $7.1 billion amidst the most challenging economic environment for coal producers in decades.
  • Advocate Health Care wins summary judgment against multiple discrimination claimsOn June 28, 2016, Jones Day obtained summary judgment for Advocate Health Care Network on nearly all of Plaintiff's discrimination claims.
  • Associated Urological Specialists sold to Solaris Health Holdings, LLCJones Day advised Associated Urological Specialists, LLC, a large Chicago-based physician group specializing in comprehensive urologic care, including radiation oncology, pathology, and pharmacy, in its sale to Solaris Health Holdings, LLC, a leading national urology platform backed by Lee Equity Partners.
  • AbbVie acquires Mitokinin, Inc.Jones Day advised AbbVie Inc. in its exclusive right to acquire Mitokinin, Inc., a biotechnology company developing PINK1-targeted therapeutics for the treatment of neurodegenerative diseases, following completion of IND enabling studies on Mitokinin's lead PINK1 compound.
  • Plastic Omnium acquires ams OSRAM Automotive Lighting Systems from ams OSRAM GroupJones Day advised Plastic Omnium in the acquisition of the Automotive Lighting Systems (AMLS) business of ams OSRAM Group in a highly complex international carve-out transaction.
  • Genesis Healthcare Partners creates partnership with Triton Pacific Capital Partners to form Urology Partners of AmericaJones Day represented Genesis Healthcare Partners, P.C., a large San Diego-based physician group specializing in comprehensive urologic care, including radiation oncology and gastroenterology, in its sale to Urology Partners of America, LLC, a newly-formed national urology platform backed by Triton Pacific Capital Partners.
  • Delaware North sells Jumer’s Casino & Hotel to Bally's for $120 millionJones Day advised Delaware North, a global hospitality and entertainment company with operations in the sports, travel hospitality, restaurant and catering, lodging, gaming and specialty retail industries, in the sale of Jumer’s Casino & Hotel in Rock Island, Illinois, to Bally's Corporation for $120 million in cash.
  • Riverside sells Dwyer Group to Harvest PartnersJones Day represented The Riverside Company in the sale of The Dwyer Group, a Texas-based franchising business operating in the United States and internationally, to Harvest Partners.
  • Tekni-Plex acquires Commodore Plastics and Commodore TechnologyJones Day advised Tekni-Plex, Inc., a portfolio company of private equity fund Genstar Capital, in connection with the acquisition of substantially all of the assets of Commodore Plastics and Commodore Technology, a family owned industrial business specializing in the manufacture of foam and plastic packaging.
  • Tekni-Plex acquires Dunn IndustriesJones Day advised Tekni-Plex, Inc., a portfolio company of private equity fund Genstar Capital, in connection with its acquisition of Dunn Industries, Inc., a family owned industrial company specializing in the manufacture of extrusion tubing for the medical device market.
  • Dwyer Group acquires Real Property ManagementJones Day represented The Riverside Company in connection with the add-on acquisition by the Dwyer Group platform of Real Property Management, the largest property management franchise in North America, and the related financing.
  • Rail carriers prevail in collective bargaining interest arbitrationIn 2018, Jones Day represented the National Carriers' Conference Committee -- a bargaining coalition comprising all of the nation's major freight railroads -- in a major arbitration to set the terms of labor agreements with two labor unions.
  • Henderson Park acquires D.C. Mandarin OrientalJones Day represented Henderson Park Capital Partners in its joint venture with Salamander Hospitality, LLC and the joint venture's $139 million acquisition and financing of the D.C. Mandarin Oriental, a 373-room luxury hotel located in the Southwest waterfront area of Washington D.C. 
  • USI Insurance Services acquires Wells Fargo Commercial Insurance businessJones Day advised USI Insurance Services ("USI"), a portfolio company of KKR and CDPQ, on the acquisition of Wells Fargo Insurance Services USA, Inc. ("WFIS") from Wells Fargo & Company.
  • Citizens Bank provides $60 million secured credit facility to rock salt mine operator and manufacturerJones Day represented Citizens Bank, N.A., as administrative agent, in connection with a $60 million senior secured revolving credit facility provided to a rock salt mine operator and manufacturer.
  • Riverside acquires WisetailJones Day represented The Riverside Company in connection with the add-on acquisition and related financing to the Alchemy Systems platform of Wisetail, a provider of a sophisticated employee learning and engagement platform to help employees at restaurants and retailers deliver excellent service.
  • ETS acquires Questar Assessment Inc. for $127.5 millionJones Day advised Educational Testing Service in its $127.5 million cash acquisition of Questar Assessment Inc., a leading K–12 assessment solutions provider focused on building a bridge between learning and accountability.
  • RockWood Equity Partners acquires substantially all assets of Ibis TekJones Day represented RockWood Equity Partners LLC in connection with the acquisition of substantially all of the assets of Ibis Tek, LLC, Ibis Tek Properties, LLC, Verbuck, LLC, and Ibis Apparel, LLC (collectively, "Ibis Tek").
  • Riverside completes sale of AutomationSolutions, Inc. d/b/a iAutomationJones Day represented The Riverside Company in connection with its sale of AutomationSolutions, Inc. d/b/a iAutomation, a developer and distributor of highly engineered automation solutions for original equipment manufacturers.
  • Riverside acquires CastlewoodJones Day represented The Riverside Company in connection with its acquisition of Castlewood Treatment Centers, an eating disorder treatment provider with clinics in California, Missouri, and Alabama.
  • Riverside sells IDOC to Investors Management CorporationJones Day advised The Riverside Company in connection with its sale of Independent Doctors of Optometric Care (IDOC), a large privately held alliance of independent doctors of optometry, to Investors Management Corporation.
  • Asmodee Group acquires Mayfair Games and English language rights to Catan brandJones Day advised The Asmodee Group in its acquisition of Mayfair Games, Inc. and the English language rights to the Catan brand.
  • Altre Pubblicazioni

    • March 2017
      Joint Employment Relationships: Best Practices & Risks, LexisNexis
    • September 2016
      Creative Strategies For Protecting Your Confidential Information and Employee Data: Trade Secret, Illinois Non-Compete Agreements, and Biometrics, 2016 Jones Day Labor & Employment Law Discussion Group

    • October 13, 2022
      National Labor Relations Board Midterm Update: Key Issues, Initiatives, and Potential Developments Impacting Union and Non-Union Employers, 2022 Annual Labor & Employment Law Discussion Group