Lake Toback DiDomenico Divorce And Family Law
We Recommend You Contact Us Before Your Spouse Does

Attorney Alejandro Gonzalez, Esq

Hamann, Sean M.

Sean
M.
Hamann

  • Partner
  • Corporate Contractual Valuation and Enforcement
  • Pre and Post Decree Family Law Matters
  • Appellate Matters
  • Child Custody and Support
  • Complex Asset Valuation and Division
  • Prenuptial Agreements
  • High Net Worth Divorces

Biography

Mr. Hamann is a Partner with Lake Toback DiDomenico, having joined the firm in 2013. Prior to joining the firm, Mr. Hamann was engaged in private practice, focusing primarily on corporate contractual valuation and enforcement, pre and post decree family law matters, and appellate matters.

Since joining the firm, Mr. Hamann has utilized his business background to concentrate his practice on litigation and alternative dispute resolution for high-net-worth individuals, prenuptial and postnuptial agreements, and complex litigation, ranging from executive liability, to private business valuation and division, reasonable retained earnings and compensation, calculation and valuation of Restricted Stock Units and equity grants, fraud and fraudulent transfers, trust agreements, asset tracing, matters of parental rights and responsibilities, and the valuation and division of estates.

In addition to his practice at the trial level, Mr. Hamann has appeared before every appellate district in the State, as well as the Illinois Supreme Court, having represented clients on dozens of appellate matters.

Mr. Hamann has also appeared repeatedly in the Northern District of Illinois, representing clients on matters of international child abduction and alleged violations of the Hague Convention.

Mr. Hamann has also appeared throughout the country, when retained pro hac vice for clients who have complex needs outside of the state, having appeared in matters in New York, Wisconsin, and Nevada.

While Mr. Hamann has enjoyed a great deal of success for clients in litigation, he takes particular pride in being able to resolve high-conflict matters by agreement, whether financial or child-related. It is the ability to litigate when necessary that helps drive Mr. Hamann to advocate for reasonable resolutions by agreement, whenever possible.

Education

  • The John Marshall Law School, Chicago, Illinois
    • J.D. - 2011
    • Honors: cum laude
    • Honors: CALI Excellence for the Future Award in the Field Of Corporation Law
    • Honors: Alternative Dispute Resolution Certification
    • Honors: Trial Advocacy Certification
  • Kelley School of Business at Indiana University, Bloomington
    • B.S. - 2007
    • Major: Marketing and Management

Bar Admissions

  • Illinois, 2011
  • U.S. District Court Northern District of Illinois
  • Supreme Court of the United States of America
  • U.S. Court of Appeals 7th Circuit

Professional Associations

  • American Institute of Family Law Attorneys, Member, 2016 to Present
  • U.S. District Court, Northern District of Illinois, Settlement Assistance Program
  • Chicago Bar Association, Member, 2011 to Present

Honors

  • American Institute of Family Law Attorneys – 10 Best Attorneys: Exceptional and Outstanding Client Service, 2016 – present
  • Judges of the United States District Court: Northern District of Illinois – award for excellence in pro bono service, 2016
  • Attorney and Practice Magazine: Top 10 Family Law Attorney – State of Illinois, 2018
  • Best of the Best: Top 10
  • Super Lawyers: Rising Stars, 2020 – 2025
  • Super Lawyers, 2026 – 2027
  • Leading Lawyers: Emerging Lawyers, 2018 – 2025
  • Leading Lawyers, 2026 – 2027

Practice Areas

  • Corporate Contractual Valuation and Enforcement
  • Pre and Post Decree Family Law Matters
  • Appellate Matters
  • Child Custody and Support
  • Complex Asset Valuation and Division
  • Prenuptial Agreements
  • High Net Worth Divorces

Representative Cases

  • *In re Marriage of Crecos, 2021 IL 126192
  • * In re Marriage of Lindell, 2023 IL App (2d) 220055
  • * In re Marriage of Harnack and Fanady, 2022 IL App (1st) 210143
  • * In re Marriage of Kimberly R. and George S, 2021 IL App (1st) 201405
  • * In re Marriage Durdov, 2021 IL App (1st) 191811
  • * In re Marriage of Paris, 2020 IL App (1st) 181116
  • * In re Marriage of Peradotti, 2018 IL App (2d) 180247
  • *Ammar v. Schiller DuCanto & Fleck, et al., 2017 IL App (1st) 162931
  • *In re Marriage of Altman and Block, 2016 IL App (1st) 143076
  • *In re Marriage of Asta and Pappas, 2016 IL App (2d) 150160
  • *In re Marriage of Lyman, 2015 IL App (1st) 132832
  • *In re Marriage of Iqbal and Kahn, 2014 IL App (2d) 131306
  • Pedersen v. Shriver 23 cv 13836
  • Cano Pineda v. Granados Gutierrez 17 cv 03424
  • Garcia v. Galvan Pinelo 14 cv 09644

Classes & Seminars

  • Much Shelist in house CLE: Changes in Family Law, 2016
  • Business Valuation, Financial & Tax Issues in Divorce: Determining "Income" of pass-through entities for support purposes, 2016