100 leading professional services firms in Illinois

JLLjill.com

A leading professional services firm specializing in real estate and investment management, creating rewarding opportunities and sustainable solutions using advanced technology

Cushman & Wakefieldcushmanwakefield.com

Global commercial real estate services provider with 52,000 professionals focused on advancing client, colleague, and community outcomes worldwide.

Gallaghergallagher.com

Global insurance brokerage offering risk management, consulting, employee benefits, claims management, and retirement services to protect assets and support clients.

RSM US LLPrsmus.com

Provider of assurance, tax, and consulting services focused on middle market clients with a global presence and professional development culture.

CDWcdw.com

A leading IT solutions provider offering a full-stack approach with extensive services and deep industry expertise to drive innovation and achieve organizational goals

HUB Internationalhubinternational.com

Advises businesses and individuals on insurance, risk management, employee benefits, retirement, and wealth management with tailored solutions.

UL Solutionsul.com

Global provider of safety testing, certification, inspection, auditing, and advisory services ensuring product security, sustainability, and market trust.

Thoughtworksthoughtworks.com

A global technology consultancy specializing in strategy, design, and engineering to drive digital innovation, fostering diverse talent and a strong cultivation culture

Baker McKenziebakermckenzie.com

Provide practical legal advice combining local knowledge and international expertise to help businesses succeed across global markets.

Grant Thornton (US)grantthornton.com

Provides independent audit, tax, and advisory services through a global network, focusing on quality, trust, and strong client relationships.

BDO USAbdo.com

Providing middle market leaders with assurance, tax, and advisory services focused on cultivating a people-centered, growth-oriented corporate culture.

Baker Tilly USbakertilly.com

A leading advisory CPA firm with a coast-to-coast and global presence, part of Baker Tilly International network with 43,000 professionals

Crowecrowe.com

A global firm providing public accounting, consulting, and technology services, helping clients make smart decisions and uncover hidden opportunities worldwide

Kirkland & Elliskirkland.com

Providing top-tier legal services in corporate transactions, litigation, investigations, and asset management with global reach and innovative approach.

Kearneykearney.com

Global consulting firm with a focus on people, strategic operations, and building the future through teamwork and hands-on expertise in over 40 countries

Gallagher Bassettgallagherbassett.com

Provider of claims and risk management services, offering consulting, technical support, and innovative solutions across global insurance sectors.

Leo Burnettleoburnett.com

Global communications agency combining creativity, data, and technology to influence human behavior and drive client prosperity worldwide.

Huronhuronconsultinggroup.com

A global professional services firm specializing in strategy creation, operations optimization, digital transformation, and empowering businesses for sustainable results

Accenture Strategy & Consultingaccenture.com

Combines deep industry expertise with advanced analytics and human-led design methodologies to help global clients act with speed and confidence throughout operations.

Sidley Austin LLPsidley.com

Providing comprehensive legal services worldwide, specializing in complex transactions, restructuring, investigations, regulatory, and litigation matters across multiple industries.

Mayer Brownmayerbrown.com

Representation of major corporations, funds, and financial institutions in complex transactions and disputes across international markets.

Sargent & Lundysargentlundy.com

A global leader in architect engineering specializing in power, energy, and decarbonization, offering comprehensive project services to public and private clients

AHEADahead.com

This company specializes in building and managing digital platforms for successful organizations, accelerating the impact of technology through innovative solutions and engineering expertise

Spencer Stuartspencerstuart.com

Specializes in senior executive search, board recruitment, leadership advisory, succession planning, and organizational effectiveness for diverse global clients.

Chartischartis.com

Consulting firm specializing in healthcare strategy, transformation, and operational models to improve affordability, accessibility, safety, and patient experience.

Mu Sigma Inc.mu-sigma.com

A leading Big Data analytics company partnering with Fortune 500 firms to enhance decision-making, recognized for innovation and transformative solutions

Cushman & Wakefield - Formerly DTZcushmanwakefield.com

A global leader in commercial real estate services, providing insights and value for occupiers and investors worldwide through various core services

Egenegen.ai

A merged company combining platform engineering with data, AI, analytics, and cloud expertise to empower organizations in their digital journeys

Perkins&Willperkinswill.com

Design and architecture firm creating healthy, beautiful spaces worldwide with expertise in architecture, interior design, urban and landscape planning.

Staff Management | SMXstaffmanagement.com

A leader in workforce solutions for fulfillment, distribution, and manufacturing industries, specializing in Onsite Workforce Management and Recruitment and Placement Solutions

Intelliasintellias.com

Trusted technology partner accelerating sustainable digitalization for top-tier organizations, delivering mission-critical projects and measurable outcomes for clients globally

ENTRUST Solutions Groupentrustsol.com

Providing engineering, consulting, and automation services to pipeline, utility, and industrial sectors with expertise in various areas across multiple office locations

Credicocredico.com

A leading customer acquisition agency connecting brands with local sales teams to acquire new customers through face-to-face methods

Claycoclaycorp.com

A full-service real estate development, architecture, engineering, and construction firm delivering high-quality solutions within North America on time and on budget

Heidrick & Strugglesheidrick.com

Providing executive search, leadership consulting, and corporate culture services to global Fortune 1000 companies for improved performance.

West Monroewestmonroe.com

Global consulting firm specializing in business and technology solutions, focusing on rapid impact through industry, strategy, and people integration.

Sikichsikich.com

A global professional services company specializing in technology solutions, delivering transformative digital strategies and financial services to various clients worldwide

Seyfarth Shaw LLPseyfarth.com

Specialized legal firm providing innovative, high-caliber representation in complex litigation, transformational deals, and cross-border projects globally.

Medix™medixteam.com

Provides workforce solutions and creates opportunities for talent in healthcare, life sciences, engineering, and technology sectors.

NORC at the University of Chicagonorc.org

An objective research organization partnering with clients to inform decisions on health, education, economy, and government programs for a better world

IMEGimegcorp.com

IMEG is a national engineering and design consulting company focusing on people-centered engineering, high-performing building systems, infrastructure, and construction services

Zifozifornd.com

Provides specialist scientific informatics services including digital transformation, data science, AI, and project management for science-driven organizations.

Addison Groupaddisongroup.com

Professional services firm specializing in talent solutions, consulting, recruiting, and executive search across various sectors, recognized for industry excellence and growth

Quinnoxquinnox.com

A platform and solutions company utilizing human and applied intelligence to simplify business processes, improve customer experiences, and create exceptional business value

MathComathco.com

Global leader in Enterprise AI and Analytics, trusted by top organizations Specializing in custom data products, advanced analytics, and connected intelligence solutions

Winston & Strawn LLPwinstontaylor.com

Provides comprehensive legal services including litigation, transactions, regulatory advice, and business solutions with a focus on client partnership and inclusion.

Cresacresa.com

A global advisory firm specializing in representing occupiers, offering integrated real estate solutions, transaction management, workplace solutions, project management, consulting, and more

Bitwisebitwiseglobal.com

Provides automated ETL, data migration, AI/ML, and BI solutions leveraging 28+ years of experience to accelerate analytics and AI readiness.

Katten Muchin Rosenman LLPkatten.com

A full-service law firm with nearly 700 attorneys offering high-value legal services globally, specializing in corporate, financial services, litigation, real estate, and more

Navigantguidehouse.com

Global provider of management technology and risk consulting services helping public and commercial clients address transformational change technology innovation and regulatory pressure

Advanced Groupadvancedgroup.com

Specializing in talent acquisition, outsourcing, and professional services, we provide strategic resourcing, staffing, consulting, and recruitment process outsourcing to various industries

CCMSIccmsi.com

A leading third-party administrator specializing in workers' compensation and property/casualty self-insurance programs with a focus on efficient, cost-effective claims management nationwide

Royal Cyber Inc.royalcyber.com

Empowering enterprises to evolve with agility, security, and innovation through digital transformation and modernization of legacy systems with AI-driven solutions.

Mérieux NutriSciences - North Americamxns.com

Global food safety partner providing testing, labeling, auditing, consulting, and research services to the food industry worldwide, focusing on consumer health and scientific excellence

Beneschbenesch.com

A leading company shaping infrastructure and communities, focused on client needs and delivering project success with top talent

Hinshaw & Culbertson LLPhinshawlaw.com

A US law firm with offices nationwide and in London specializing in insurance, professional services, banking, finance, debt collection, and litigation services

The Mom Projectthemomproject.com

Empowering moms to succeed in the workforce by recognizing their diverse talents and skills, ultimately benefiting families, businesses, and society

Jenner & Blockjenner.com

Jenner & Block is a renowned law firm with over 500 lawyers known for fearless advocacy, creative solutions, and shaping legal outcomes

DGS Technical Services Inc.dgsts.com

Structural steel design, detailing, and mechanical engineering services provider with expertise in various disciplines and offshore delivery capabilities in multiple countries

PeopleScoutpeoplescout.com

Global talent solutions provider offering RPO, MSP, and total workforce solutions with AI-driven technology, data insights, and a focus on efficiency and cost reduction

ARiarigs.com

Global engineering firm offering services in Embedded Software, Product Engineering, Manufacturing Engineering, Testing & Validation, Automation & Robotics, and Digital Transformation to industry leaders worldwide

66degrees66degrees.com

A leading AI and Data consulting company specializing in developing AI-focused solutions using the latest advancements in AI, data, and cloud technology

Advanced Clinicaladvancedclinical.com

clinical development and strategic resourcing organization improving clinical research experiences and outcomes through customized solutions and experienced guidance

Clune Construction Companyclunegc.com

A national, employee-owned general contractor providing construction management services, focused on ethical practices, employee satisfaction, and innovation for clients

HORNEhorne.com

Professional services firm supporting clients in public, private & government sectors nationwide, empowering team members to serve with empathy and clarity

Harborharborglobal.com

A global provider of expert services in strategy, legal technology, operations, and intelligence for leading law firms, corporations, and law departments

K2 Servicesopensitysolutions.com

Provider of IT consulting and support services for the legal community, specializing in document management, application support, networking, security, training, and help desk support

Lochnerhwlochner.com

Trusted infrastructure services provider for aviation, surface transportation, and water clients nationwide, driven by values, collaboration, and excellence

CIeNET Technologiescienet.com

A leading technology service provider offering technical consulting, software engineering, and solution services to Fortune 500 companies globally with top-notch quality assurance processes

Impact Advisorsimpact-advisors.com

Healthcare management consulting firm solving industry challenges with team of experts, quality solutions, and measurable value Award-winning and innovative culture

JSG (Johnson Service Group, Inc.)jsginc.com

A leader in staffing and consulting services with 40 years of experience, offering world-class service, diverse offerings, and IT consulting

Wiss, Janney, Elstner Associates, Inc.wje.com

Global firm of engineers, architects, and materials scientists providing innovative solutions for problem-solving, repairs, and prevention in the built world

DHR Globaldhrglobal.com

Global leadership consulting and executive search provider across twenty industries, offering talent advisory and emerging leader solutions through sixty worldwide market locations.

Veddervedderprice.com

A global law firm with over 400 professionals providing high-value legal counsel in M&A, banking, litigation, executive compensation, employment law, and more

ARMStrong Insurance Servicesarmsrm.com

A leading parent company in debt recovery and financial solutions serving businesses with efficient B2B collections and tailored debt recovery services

HBK Engineering, LLChbkengineering.com

A professional engineering design team providing civil, environmental, structural, electrical, and utility services with a focus on accurate, time-sensitive projects

Kay and Associates, Inc.kayinc.com

Established in 1960, providing high quality engineering and technical services to industry and government worldwide, specializing in maintenance and contract management

Locke Lord LLPtroutman.com

Premier full-service law firm specializing in complex litigation, regulatory, and transactional work for clients globally, with a focus on diverse industries

Professional Service Industries, Inc. (PSI)intertek.com

A leading provider of quality solutions in the construction industry, offering integrated engineering, testing, and assurance services to a broad customer base

Baker Tilly One Indiamossadams.com

Global expansion of a leading accounting and consulting firm with a focus on delivering high-quality services, innovation, and developing future leaders

TopBloctopbloc.com

A technology consulting firm specializing in fixed-price Workday deployment and support services, using automation technology to streamline processes for clients

Palni Incpalni.com

A technocratic company specializing in Salesforce consultation, implementation, and integration to boost clients' revenue by solving complex problems and providing IT strategy

UITuitonline.com

This company based in Chicago offers comprehensive solutions for telecommunications companies, including consulting, staffing services, training, and education programs nationwide

LaSalle Networkthelasallenetwork.com

Specializes in staffing and recruiting across multiple industries, placing candidates in temporary and permanent roles nationwide since 1998.

The Second Citysecondcity.com

This professional services company uses comedy theater methods to create engaging events, content, and development programs that inspire better performance

Buckajg.com

An integrated firm providing HR, pensions, and employee benefits consulting, technology, and administration services to organizations, trustees, and employees for secure futures and improved performance

Smithbucklinsmithbucklin.com

Providing comprehensive association management, event coordination, educational programming, and strategic consulting to modernize operations, advance organizational missions, and deliver enhanced member value.

LCWlcwinclusion.com

LCW helps organizations worldwide thrive in culturally diverse environments through DEI and culture transformation consulting, training, and translation services

O'Hagan Meyerohaganmeyer.com

A national law firm specializing in defending corporations in litigation cases, providing tailored services for clients across multiple locations nationwide

Trustwave, A LevelBlue Companylevelblue.com

Reduces cyber risk, fortifies organizations against threats, detects what others cannot, responds with speed, optimizes cyber investment, improves security resilience.

Revantage, A Blackstone Portfolio Companyrevantage.com

A global leader in corporate services catering to Blackstone Real Estate portfolio companies and investments worldwide

SCBscb.com

A leading architecture firm offering design services for urban living, workplaces, learning environments, infrastructure, and communities with a century-long legacy

Spaulding Ridgespauldingridge.com

Global leader in business transformation for CFO and CRO offices Specializing in improving insight, collaboration, and decision-making through cloud technology solutions for Fortune 500 companies

Farnsworth Group, Inc.f-w.com

Employee-owned design firm with over 500 professionals offering architecture, engineering, surveying, and consulting services to create lasting relationships and deliver exceptional design solutions nationwide

Kaufman Hallkaufmanhall.com

The company specializes in providing management consulting services to healthcare and higher education institutions to optimize their financial planning and performance

Vestianvestian.com

Vestian provides conflict-free real estate services, prioritizing occupier interests, offering strategic guidance, brokerage, design & build, and management solutions globally

Hilco Globalhilcoglobal.com

Global independent financial services firm providing valuation, monetization, advisory, and capital solutions for tangible and intangible assets, specializing in maximizing value for companies

Enventure Engineeringenventure.com

A leading Engineering, Supply Chain, and Compliance solutions provider with expertise in engineering services, master data management, asset management, and compliance solutions

Cook County Public Defendercookcountypublicdefender.org

A leading criminal defense firm in Cook County, Illinois, providing legal representation to thousands of individuals facing criminal charges and child protection violations

Hanson Professional Services Inc.hanson-inc.com

Employee-owned consulting firm offering engineering, planning, and allied services, with a focus on client success through hands-on project management