Gartner Expert

John Kostoulas

VP Analyst

John Kostoulas is a Vice President Analyst in Gartner's Technology and Service Provider (T&SP) research group focused on human capital management (HCM) technologies, processes and services.

Mr. Kostoulas spends most of his time advising HCM technology and service providers of various sizes, from startup to established, across the world through published research and daily interactions. Topics include market opportunity, strategy, product roadmap, positioning, go-to-market and operations for HCM products and services. He also advises technology and service providers on how to address their challenges around talent, culture and capabilities, and how to build strong product teams.

In addition, he supports HR, IT and other business leaders on decisions related to talent management and HR service delivery redefinition due to digitalization, impact of diversity, equity and inclusion, importance of employee experience, and profound changes in the workforce and the workplace. John is also the co-leader of the Software Market Community, a group of 30+ software market analysts, coordinating regular meetings and focused research initiatives on emerging technologies and market trends.

Previous experience

Before joining Gartner, Mr. Kostoulas had 16 years of holistic experience and a solid track record in human capital technology and transformation from the perspectives of consulting and service providers, software vendors and large corporates. He has led numerous global-scale initiatives for world-class organizations on global implementation of leading technology solutions including: change management, technology operations and adoption, global service delivery/process/metrics design, global shared services/BPO business case creation/setup/transition, and organizational design of various functions.

Professional background


Principal Manager, Global HR Systems Architecture and Operations

Coca-Cola HBC

Group HR Business Process Leader


Senior HCM Sales Consultant

Areas of coverage

Product Strategy and Launch for Tech CEOs

HCM Technology Transformation

Product Leadership

Customer Acquisition for Tech CEOs

Product Planning


Leadership Decision Making, John F. Kennedy School of Government, Harvard University

Master of Business Administration, Schulich School of Business, York University

Diploma in Production Engineering and Management, Technical University of Crete

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Top Issues That I Help Clients Address

1HCM technology providers and Payroll BPO providers: Market trends, strategy, positioning, product roadmap, go-to-market

2Technology and service providers: How to address talent, culture and capabilities, how to build strong product teams

3Diversity and inclusion: Why it matters, how technologies can help

4End-user clients: Advice on HCM software - technology strategy, trends, vendors, value drivers, business case

5End-user clients: Advice on Payroll BPO and HR uses of RPA - strategies, trends, providers, value drivers, business case