US-based consulting organisation McKinsey & Company has been in operation for over 90 years. Delivering expert advice to a range of industries such as the automotive, chemicals and oil and gas sectors, McKinsey & Company helps customers accelerate their digital transformation journeys. Since its founding in 1926, the firm has grown significantly and today operates in 65 different countries while employing approximately 30,000 people worldwide.

Founded in 1981, Infosys empowers companies to digitalise their offerings. With customers in 46 countries, the firm provides services in blockchain, cloud, data analytics and mainframe modernisation. The India-based organisation employs over 243,000 people worldwide and helps its clients to harness and embrace change through its AI-powered core. From humble beginnings consisting of just capital US$250 of capital to the $12.3bn it generated in revenue during 2019, Infosys has been on quite the journey over the past four decades.

As a leading consulting, technology services and digital transformation company, Capgemini is at the forefront of the latest industry trends. Offering an array of services centred around technology, Capgemini serves several different industries such as aerospace and defence, telecoms and manufacturing. With over 200,000 employees in more than 40 countries, the company prides itself on its human-centric approach to technology, placing people at the heart of its strategy.

Also helping companies accelerate their digital transformation journeys, Cognizant Technology Services serves a range of industries such as banking, manufacturing and logistics. The organisation recognises that speed is critical to all successful supply chains, and combines human insights with advanced technologies in order to create greater efficiency and provide quicker time to market at a reduced cost. The firm primarily has three key practice areas that cover its business — digital business, digital operations, and digital systems and technology.

India-based IT and consultancy company, Tata Consultancy Services, combines digital expertise and business intelligence to catalyse change and deliver results. Through innovative, technology-focused consultancy, TCS strives to help businesses achieve their objectives. With more than 446,000 employees from 146 different countries, its services include expert advice on artificial intelligence (AI), cybersecurity and blockchain, among others. In 2016, TCS was one of just eight organisations worldwide to be recognised as a “Global Top Employer” and it has retained that title over the past four years.

Considered one of the largest global professional services organisations, Accenture employs over 500,000 people in more than 120 countries. Operating with primarily a tech-focused approach, Accenture provides a range of services and solutions such as consulting, digital, technology, strategy and operations. Working across over 40 industries, Accenture is versatile and diverse, and its consultants guide the world’s biggest companies through digital transformations while helping them to achieve significant growth.

KPMG is a member of the Big Four, alongside EY, PwC and Deloitte. Its member firms operate in 147 countries and employ 219,000 people combined. With a mantra to strive for quality and service excellence in all that it does, KPMG helps its clients to deal with rapid transformations in their respective industries. Its services include audit and assurance, tax and legal, advisory and enterprise. While promoting change is a clear priority for the firm, KPMG also has a robust sustainability strategy and its network invested over $110mn in local communities during 2018.

A major player in the consulting space, Ernst & Young caters to a range of different sectors across international markets. Its services include assurance, advisory, core business services, tax and transaction advisory services. EY operates teams in 25 different locations worldwide and maintains a drive to provide first-class consultation and advice. The UK-based company is well-placed to help propel its clients to greater efficiency in a bid to accelerate respective operations.

Officially known as PricewaterhouseCoopers, the company operates in 157 different countries and employs over 276,000 people. PwC is renowned as one of the leading consulting firms worldwide and serves 26 industries. Its services in the fields of assurance, tax, human resources, transactions, performance improvement and crisis management has helped to solve global client and stakeholders issues. PwC has a number of targets it wants to achieve before 2022. Some of these include increasing the proportion of new women hires to 50%, providing paid work experience to 1,000 young people from disadvantaged backgrounds and to collectively volunteer 250,000 hours in total.

Founded in 1845 by William Deloitte, the firm transformed from an initial accounting office in London to the well-renowned name it is today. The final member of the Big Four, Deloitte provides four core services - audit and enterprise risk services, consulting, tax, and financial advisory. The company has particularly high revenue streams in the US, having made $6.4bn more in revenue in the region than the second largest of the Big Four, PwC, and twice as much as KPMG during 2019. Deloitte operates in more than 150 countries and employs 312,000 people worldwide.