Kim A. Leffert: Lawyer with Mayer Brown LLP

Kim A. Leffert

Chicago,  IL  U.S.A.
Phone312 701 8344

Peer Rating
AV® Preeminent

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Practice Areas

  • Employment & Benefits
  • Hospitality & Leisure
  • Litigation & Dispute Resolution
  • Electronic Discovery & Information Governance
  • Employment Litigation & Counseling
  • Privacy & Security
Contact InfoTelephone: 312 701 8344
Fax: 312 706 9166
University Cornell University, B.A., 1983
Law SchoolThe University of Chicago Law School, J.D., 1986
Admitted1986, Illinois; US Court of Appeals for the Fourth Circuit; US Court of Appeals for the Sixth Circuit; US Court of Appeals for the Seventh Circuit; US District Court for the Northern District of Illinois; US District Court for the Southern District of Illinois; US District Court for the Central District of Illinois


American Bar Association, Section on Labor and Employment Relations

Chicago Bar Association, Labor and Employment Committee, and past co-chair of the Young Lawyers' Section Labor and Employment Committee


Kim Leffert has an extensive litigation practice. A significant and growing part of her work involves electronic discovery issues. Kim has substantial experience assisting clients with the preservation, collection, review and production of electronic documents in litigation. She also helps clients prepare document retention policies and procedures and records management programs, as well as develop electronic discovery programs.

Kim's other primary emphasis is on labor and employment disputes. She has bench and jury trial experience in federal and state court actions involving state common law theories (breach of contract and tort) and wage-and-hour issues, as well as the defense of employers in a wide variety of EEO and Section 301 actions. She has argued cases before the Fourth and Seventh Circuit Court of Appeals on disability discrimination and sexual harassment. In administrative proceedings, Kim represents employers before the National Labor Relations Board (unfair labor practice claims, unit determinations, election proceedings) and the EEOC and state human rights agencies (discrimination charges and hearings). She has also participated in court and agency sponsored formal mediation programs and represents employers in labor arbitrations.

Kim also counsels employers on proactive strategies to avoid litigation and disputes. She helps clients craft appropriate handbooks and policies (including preservation of employment-at-will rights and compliance with FMLA, veterans rights, state protective laws) and offers guidance on WARN compliance regarding plant closures. In the area of discrimination, Kim assists clients with EEO issues in both individual and collective employment decisions, defends against discrimination claims (Title VII, ADA, ADEA and state/local equivalents), prepares affirmative action plans, represents employers during compliance reviews and in the resulting administrative proceedings, and presents training programs on various EEO topics.

Kim's employment law counseling addresses a variety of other employer concerns. She advises management on collective bargaining strategies and contract interpretation issues. When necessary, she investigates alleged executive wrongdoing. And when mergers, acquisitions and other business transactions arise, she helps clients conduct employment-related due diligence, negotiates contract provisions, and drafts employment-related sections of transaction documents.

Finally, Kim has made a strong impression on clients, one of whom commented in Chambers USA 2010, She has done an excellent job and has been helpful and pleasant to work with; she is experienced, confident and very thorough.

Kim joined Mayer Brown in 1994 after nearly a decade with two other Chicago law firms.


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Tip of the Month: Staying Informed About State Data Breach Laws
Rebecca S. Eisner,Kim A. Leffert,Lei Shen, September 1, 2014
A growing consumer products company is expanding its sales from brick and mortar stores to the Internet. The general counsel, who is charged with overseeing information governance at the company, is interested in keeping abreast of state data breach laws as the company grows and expands into new...

Electronic Discovery & Information Governance - Tip of the Month: Preserving Electronically Stored Information When Employees Depart
Anthony J. Diana,Kim A. Leffert, April 2, 2014
A large company has reorganized its operations and plans to terminate or reassign a number of employees. The company’s head of litigation knows that some of the affected employees are subject to a litigation hold and wants to ensure that data is not lost or misplaced as a result of employees...

Electronic Discovery & Information Governance - Tip of the Month: Social Media E-Discovery
Anthony J. Diana,Kim A. Leffert,Richard E. Nowak, February 5, 2014
A large corporation has been sued by former employees who allege that their supervisors harassed them and made inappropriate remarks in the workplace and on social media. During discovery, the corporation receives a document request for the supervisors’ social media postings, emails and...

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Office Information

Kim A. Leffert

71 S. Wacker Drive
ChicagoIL 60606


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