Timothy G. Costello

Of Counsel || Milwaukee

Timothy G. Costello has been practicing labor and employment law since 1980. His practice emphasis is in the construction, hard goods manufacturing, food manufacturing, and distribution industries.

Tim is a contributing author to various publications on Wisconsin’s Family and Medical Leave Law, OSHA and related safety issues, and co-author of Construction Labor and Employment Law for the Wisconsin Contractor, published by the Wisconsin Chapter of the Associated General Contractors of America, Inc.

He is a frequent presenter to employers and associations on federal and state discrimination law, OSHA and employee discipline and the law. As a member of Wisconsin Manufacturers & Commerce’s Human Resources Steering Committee, Tim is also involved in several employment cases before the Wisconsin Supreme Court or its Courts of Appeals as amicus curiae and has testified before Joint Legislative Committees in Wisconsin concerning employment law reforms.

He is admitted to practice in all Wisconsin state courts, before the U.S. District Courts in Wisconsin, Michigan and Northern District of Illinois. Tim is also admitted to practice before the U.S. Courts of Appeals for the Sixth, Seventh, Eighth and Eleventh Circuits.

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Some examples of Tim’s litigation experiences are:

  • an OSHA decision reducing proposed OSHRC penalties from $255,500 to $33,500; and

Tim has also handled over 100 labor arbitrations and has represented many employers in collective bargaining negotiations.


Admittance to Practice

Professional Activities

  • State Bar of Wisconsin (Labor and Employment Section)
  • Wisconsin Manufacturers & Commerce (Member of Human Resources Steering Committee)
  • Associated General Contractors, Wisconsin Chapter
  • Associate Board of Directors, Associated General Contractors of Wisconsin
  • Wisconsin Legislative Council (Public Member of Special Committee on Genetic and Medical Information in the Workplace)
  • Associated General Contractors (National Labor Lawyers Council)
  • Wisconsin Transportation Builders Association, Inc.
  • Wisconsin Legislative Council Committee on the Americans with Disabilities Act
  • Wisconsin Legislative Council Committee on Expunction of Criminal Records (testified)
  • Associate Member, Board of Directors of the Associated General Contractors of Wisconsin, Inc. Chapter


Ranked in Chambers USA
Best Lawyers Award Badge

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