Consulting firms headquartered in Illinois

Grant Thornton (US)grantthornton.com

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

Crowecrowe.com

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

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

CEScesltd.com

Providing technology and business process modernization services including digital transformation, enterprise applications, managed IT, cloud, renewables, and cybersecurity solutions.

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

Ensonoensono.com

Ensono is a technology adviser and managed service provider, specializing in digital transformation, cloud migration, and application modernization for businesses worldwide

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

Intelliasintellias.com

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

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

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.

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

Cresacresa.com

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

Technology by JLLjll.com

JLL Technologies delivers innovative real estate technology solutions, expertise, and venture-backed companies to transform the way spaces are acquired and managed

Bitwisebitwiseglobal.com

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

Navigantguidehouse.com

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

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

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

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

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

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

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.

Levi, Ray & Shoup, Inc. (LRS)lrs.com

Founded in 1979, this company provides innovative IT solutions globally with over 900 employees, offering equal employment opportunities and diversity

CyberTech Systems and Software, Inccybertech.com

Specializing in Enterprise Cloud Transformation, providing Cloud-based SAP and Esri ArcGIS solutions for improved customer experiences, real-time insights, productivity, and spatial analytics integration

Redwood Logisticsredwoodlogistics.com

Modern 4PL provider offering digital freight brokerage, flexible freight management, and cloud-based supply chain integration services globally.

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

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

Unspecifiedunspecified.io

The company specializes in building software products that connect people and offers consulting services for businesses in need of senior level development expertise

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

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

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

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

AST LLCibm.com

An award-winning enterprise systems integrator providing leadership in systems integration, project management, and training for Public and Commercial Sectors worldwide

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

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

Collins Engineers, Inc.collinsengr.com

A pioneering engineering firm specializing in structural, transportation, and underwater engineering, providing innovative design and analysis services with practical field experience

Enterprise Solutions Inc.enterprisesolutioninc.com

Technology services company specializing in software and engineering solutions, implementation of VMS, MSP, ERP, cloud, analytics, and digital transformation, with a focus on client satisfaction

Sterling Engineeringsterling-engineering.com

An award-winning company providing engineering project services and technical recruitment across industries, offering flexible solutions to clients since 1969

Captive Resources, LLCcaptiveresources.com

A leader in member-owned group captives, providing insurance solutions to control costs, drive profitability, and promote diversity, equity, and inclusion

Strategic Systems Internationalssidecisions.com

Builds data-driven applications for tech companies and enterprises leveraging advanced analytics and software engineering expertise across various sectors like FinTech, HealthTech, and IoT.

RINA North America (formerly Patrick)rina.org

An engineering & design firm offering construction, management services, and technology solutions across various sectors with a focus on community impact

Rightpointgenpact.com

A global experience leader providing Total Experience solutions for clients to drive growth through human-centric digital transformations

Katalyst Software Services Limitedkatalysttech.com

provides software products, technology services, and solutions specializing in ERP, supply chain, manufacturing, digital commerce, and professional services globally

MAVERICK Technologies, A Rockwell Automation Companyrockwellautomation.com

A global professional services firm specializing in industrial automation, enterprise integration, and sustainability services, delivering innovative solutions with deep technical knowledge

Maven Wave, an Eviden Companyatos.net

Leading next-generation technology company specializing in data-driven, trusted, and sustainable digital transformation with expertise in AI, cloud, security, and advanced computing.

Sedona Technologiessedonatek.com

A global firm specializing in consulting, software development, digital workplace solutions, workforce training, web/mobile design, infrastructure security, and technical staffing services

Nvizion Solutionsnvizionsolutions.com

A digital solutions provider with expertise in commerce implementations, focusing on delivering top-notch digital experiences and driving digital transformation for clients globally

TranSmarttransmartinc.com

A transportation-focused company providing professional services in planning, engineering, and construction for public and private sector clients nationwide

Gagen MacDonaldgagenmacdonald.com

A strategy execution firm specializing in employee engagement, culture change, and leadership development, using brand and culture to transform companies and drive results

Lyons Consulting Grouplyonscg.com

Global commerce service provider specializing in delivering innovative digital commerce solutions and guiding clients through retail and eCommerce challenges to optimize performance and growth

Genecageneca.com

A technology consulting firm focused on delivering business benefits through transparent, innovative software solutions, building successful partnerships with clients

American Surveying & Engineering, LTDamericansurvey.com

A consulting firm offering diverse professional services including transportation engineering, surveying, storm water management, LiDAR mapping, hydrography, SUE, geodetic surveys, and right of way acquisition

Peters & Associates (Acquired by Ascend Technologies)teamascend.com

This company enables business growth through innovative IT solutions, secure systems, and optimized user productivity, helping businesses expand and innovate

Kattech Systems Inckattechsystems.com

Provider of IT solutions for private and public sectors, offering insight and expertise for development and growth

Glenysys Technologies Incglenysys.com

Providing personalized IT solutions and services that go beyond technology to meet clients' needs and enhance their operations

EdgeOne Medicaledgeonemedical.com

Provider of product development support for medical devices and combination products, partnering with companies of all sizes and governed by ISO 13485 quality system

Securionsecurion.io

A security-focused company offering vendor agnostic, secure by design solutions to solve complex cybersecurity challenges in a rapidly evolving threat landscape

Synchronous Solutions, Inc.synch-solutions.com

A Chicago-based management consulting and technology firm specializing in delivering business transformation solutions to enhance organizational value for its community

AuctusSolauctussol.com

Global provider of professional services and business enterprise solutions for over 25 years, specializing in Digital Transformation, SAP, Cybersecurity, Data Engineering, and Consulting

Solution Partners Servicessolpartservices.com

Solution Partners Services provides comprehensive IT services for various clients, delivering marketplace or customized solutions with an emphasis on proactive delivery and quality assurance

Cohesioncohesionib.com

Provides software, AI, and advisory services integrating people, systems, and spaces for security, maintenance, experience, and energy management.

Radiss Tech Servicesradiss.com

Global IT consulting company specializing in Enterprise and managed services, web security, and cloud computing solutions for Fortune 500 enterprises across various industries

360 Energy Group360eg.com

Energy consulting firm providing comprehensive energy solutions to public and private sectors worldwide, optimizing energy resources, reducing emissions, and increasing profitability through expert commercialization and deployment services

MorganHR, Inc.morganhr.com

Industry-leading HR Compensation consulting and software company specializing in strategy, rewards, organizational development, communication, and change management, promoting fair and transparent compensation practices

Taiber Kosmala and Associates, LLCtaiberkosmala.com

An independent investment consulting firm managing $15 billion in client assets, providing custom investment programs for institutional clients, financial intermediaries, and family offices

NueVista Groupnuevista.com

Provider of expert IT consulting and professional services focusing on maximizing value from technology systems and applications, with a reputation for quality, experience, and integrity

Hilco Corporate Finance, LLChilcocf.com

A financial services company specializing in valuation, monetization, and advisory solutions to businesses

SDA Consulting, Incsdaci.com

A consulting firm leveraging real-world knowledge to maximize business potential through strategic, application, database, technology development, and managed services across various industries

US Tech Source Inc.ustechsource.com

An IT consulting firm in North America offering professional services in digital transformation, cloud platforms, big data, cloud security, and Blockchain development

Erthe Energy Solutionsertheenergysolutions.com

A woman-owned business with 35 years' experience in energy efficiency, specializing in helping utilities improve program portfolio operations and customer experience

Impaxsimpaxs.com

This company specializes in helping B2B companies create captivating video content that establishes trust and attracts their ideal customers

Prime TSRonec1.com

Technology modernization consultancy creating custom solutions for organizations to manage the past, navigate the present, and plan for the future in ever-evolving landscapes

Brain Brickbrainbrick.net

Cloud services provider and IT consulting firm offering application development, business intelligence, cloud enablement, ERP, infrastructure support, and testing services globally

Innstra Inc.innstra.com

Global IT consulting company enabling innovation to help clients achieve strategic goals with domain expertise for CIO's, CFO's, and CEO's

Banner Capitalbannercapital.com

A global advisory and management firm catering to private investors, providing strategic resources for direct investments in businesses, real estate, and alternative assets

Chicago Technical Groupctgtek.com

A global consulting and innovation company offering technology and consulting services with a focus on strategy, project management, workforce performance, and customer relationship

Roland Burgerrolandberger.com

Global management consulting firm offering customized services across industries and competencies, with international reach and local presence in key markets

RELAY Business Management Services, LLCrelaybms.com

A global management consulting firm offering comprehensive services to optimize business operations, implement digital transformation, and drive innovation in a competitive market

Coppervale - now part of Saras Partnerscoppervale.org

A leading consultancy specializing in energy management, engineering, and sustainability services for the broadband industry, offering operational support, process improvements, and sustainability strategies