Segal McCambridge Singer & Mahoney
Segal McCambridge Singer & Mahoney is a United States litigation law firm headquartered in Chicago.
Last updated August 31, 2026
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Overview
Segal McCambridge Singer & Mahoney, Ltd. is a United States law firm focused primarily on litigation. Founded in Chicago in 1986 by attorneys William F. Mahoney, Edward J. McCambridge, Donald Segal, and Jeffrey Singer, the firm developed from a local practice into a multi-office litigation platform serving clients across the country. Its work spans appellate, commercial, complex toxic tort, construction, employment and labor, environmental, insurance, pharmaceutical and medical-device, professional-liability, products-liability, transportation, and warranty matters. The firm's development has been marked by geographic expansion. It had grown to approximately 20 attorneys by the middle of the 1990s, reflecting an early period of practice and client-base development after its establishment. Subsequent offices extended its presence beyond Chicago, including Detroit in 1997, Austin in 1999, Philadelphia in 2000, New York City in 2003, Jersey City in 2008, Houston in 2018, Fort Lauderdale in 2020, Indianapolis in 2021, and St. Louis in 2015. The referenced firm profile describes the organization as having approximately 140 lawyers and offices in multiple United States locations. Segal McCambridge's positioning is that of a specialized litigation firm rather than a general commercial-services brand. Its practice range covers disputes and liability questions affecting businesses, manufacturers, insurers, employers, contractors, transportation companies, pharmaceutical and medical-device companies, and other institutional clients. The firm's capabilities include both trial-level work and appellate matters, with subject areas that often involve technically complex facts, regulatory issues, insurance coverage, workplace disputes, alleged product defects, environmental exposure, and professional negligence. The firm's headquarters is in Chicago's Willis Tower, formerly known as the Sears Tower. Chicago remains central to the firm's identity because the organization was founded there and maintains its headquarters there, while the later office openings give it a national rather than purely local operating footprint. Publicly available reference material identifies its principal service geography as the United States. Information supplied for this entry does not establish a specific current managing partner, ownership structure, revenue figure, or official website URL, so those fields are left unspecified.
History
Segal McCambridge Singer & Mahoney was established in Chicago in 1986 by William F. Mahoney, Edward J. McCambridge, Donald Segal, and Jeffrey Singer. The firm's creation placed it within the United States legal-services sector as a litigation-focused practice. Rather than presenting itself primarily as a broad corporate-services firm, it built its identity around representing clients in disputes involving commercial relationships, liability, insurance, employment, construction, transportation, and other contentious matters. During its first decade, the firm expanded from its founding base and had reached approximately 20 attorneys by the mid-1990s. The subsequent history described in the reference material is primarily one of geographic growth. Detroit was added in 1997, followed by Austin in 1999 and Philadelphia in 2000. New York City joined the firm's office network in 2003, and Jersey City followed in 2008. These openings extended the firm's reach into important commercial and industrial centers while retaining Chicago as its headquarters and institutional base. The firm continued its expansion during the 2010s and early 2020s. St. Louis was added in 2015, Houston in 2018, Fort Lauderdale in 2020, and Indianapolis in 2021. This sequence broadened the organization's coverage across the Midwest, Northeast, South, and Texas. The resulting network is presented as a United States-wide platform rather than an international partnership. The referenced profile describes approximately 140 lawyers and identifies ten offices: Austin, Chicago, Detroit, Fort Lauderdale, Houston, Indianapolis, Jersey City, New York City, Philadelphia, and St. Louis. Its practice history reflects the types of disputes encountered by corporate and institutional clients. The firm's listed capabilities include appellate and commercial litigation, complex toxic torts, construction, employment and labor, environmental matters, insurance, pharmaceutical and medical-device disputes, professional liability, products liability, transportation, and warranty matters. This combination suggests a practice organized around contested claims, defense work, liability allocation, and business disputes across regulated and industrial sectors. The materials do not provide enough information to identify individual practice leaders, major verdicts, landmark cases, mergers, financial results, or a current corporate parent. Segal McCambridge remains headquartered in the Willis Tower in Chicago, a building formerly known as the Sears Tower. Its name incorporates the surnames of its four founders, preserving the partnership's original identity as the firm expanded. On the available material, the firm is an active, privately held professional-services organization operating in the United States.
- 2021
Indianapolis office opened
[1]The firm added Indianapolis to its United States office network.
- 2020
Fort Lauderdale office opened
[1]The firm opened an office in Fort Lauderdale.
- 2018
Houston office opened
[1]The firm's office network expanded to Houston.
- 2015
St. Louis office opened
[1]The firm established an office in St. Louis.
- 2008
Jersey City office opened
[1]The firm added a Jersey City office to its network.
- 2003
New York City office opened
[1]The firm expanded into New York City.
- 2000
Philadelphia office opened
[1]The firm opened a Philadelphia office.
- 1999
Austin office opened
[1]The firm established an office in Austin, extending its presence into Texas.
- 1997
Detroit office opened
[1]The firm expanded its office network to Detroit.
- 1990
Growth during the first decade
[1]By the middle of the 1990s, the firm had grown to approximately 20 attorneys.
Products and positioning
A national United States litigation firm with a broad industry and dispute-resolution practice, combining a Chicago headquarters with offices in multiple major markets.
Legal services · 1986
Litigation and dispute-resolution services
The firm's principal offering is legal representation in contested matters. Its litigation work includes commercial and appellate disputes as well as specialized claims involving liability, insurance, employment, construction, transportation, environmental exposure, and other business risks. The practice serves institutional and corporate clients rather than selling consumer products.
Legal services
Products-liability and complex-tort representation
Segal McCambridge handles products-liability and complex toxic-tort matters, including disputes associated with allegedly harmful products, industrial exposures, and related claims. Its stated experience also encompasses pharmaceutical and medical-device litigation, areas that may require technical, scientific, regulatory, and damages analysis.
Legal services
Commercial, insurance, and professional-liability services
The firm represents clients in commercial disputes, insurance matters, professional-liability claims, and related business litigation. These services can involve contractual disagreements, coverage questions, negligence allegations, allocation of responsibility, and defense of professionals or organizations facing claims.
Sources1 sources
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