Our Team

One of TTS’s strength lies in its expert team. TTS’s carefully selected expert team of consultants are all industrial/organizational psychologists and have at least 10 years of different industry experience in the industrial psychology field.

Hennie Kriek

CEO and President

Dr. Kriek is Professor Extraordinarius at the Department of Industrial and Organisational Psychology at the University of South Africa. His most recent position was that of President of SHL USA, Canada and Latin America. Before that…

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Fred Guest

Managing Director

Fred Guest is a Registered Industrial Psychologist and holds a Masters degree in Industrial Psychology from the Rand Afrikaans University (1996). His most recent position was that of Head of Professional Services with SHL South Africa. He worked with….

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Renier Lewis

CIO

Renier Lewis is a well-rounded IT specialist with a passion for creating specialised, secure and reliable, yet user-friendly and easy to understand customer solutions. As a trained Microsoft Certified Systems Engineer (MCSE), Renier has used his extensive troubleshooting skills to help customers…..

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David Conradie

Executive Head

David is currently the Executive Head of the Leadership Academy at TTS. He has over twenty years corporate and consulting experience in the field of talent management. He was educated at the University of the Witwatersrand where he graduated with a Master of Arts degree (cum laude) in Industrial Psychology.

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Wayne Cascio

Principal Consultant and Scientific Advisor

Wayne F. Cascio holds the Robert H. Reynolds Chair in Global Leadership and is a Distinguished University Professor at the University of Colorado Denver. He has served as president of the Society for Industrial and Organizational Psychology (1992-1993), Chair of…

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James Outtz

Principal Consultant and Scientific Advisor

Dr. Outtz’ expertise in selection system design and discrimination issues as well as his extensive work in the public and private sectors, make him a highly sought after legal compliance consultant and testifying expert. He is often…

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Sheldon Zedeck

Principal Consultant and Scientific Advisor

For 40+ years, Dr. Zedeck has been active in consulting with private and public sector organizations. He has developed selection and promotion systems for private and public organizations, for jobs from entry level through senior management. He has also…

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AJ Van de Voort

Global Account Director

AJ is a global executive with 25 years of business development, operational and managerial experience in large corporations. Most of that experience was gained while working in the upstream oil and gas industry. He has deep expertise…

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Ed Coster

Managing Consultant (Chicago,IL)

Before joining TTS, most recently, Ed Coster implemented a large scale change program “World Class Manufacturing” at Froedtert Malt in Milwaukee, one of the world’s largest malt producers. The focus of the project was to improve performance of people and systems. He succeeded in redefining the culture…

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R. Chris Steilberg

Managing Consultant

Chris has practiced organisational psychology over 20 years. He’s consulted to organisations, large and small, lectured in universities and published his insights to advance the still under-leveraged potential of psychology to improve work…

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Eltroné Schellink

Managing Consultant

As a result of her 13 years professional Human Resources Management experience (of which 4 years in consulting; 5 years in managerial roles; and 4 years in a generalist capacity) Eltroné gained in various industries, she can work within a range of focus areas including….

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Jörn Dannheimer

Managing Consultant

Jörn is a registered Industrial Psychologist and holds a Master’s degree in Industrial and Organisational Psychology at the University of Pretoria. He joined TTS in June 2011 as a Managing Consultant. Fundamentally his focus is to assist clients….

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Marinus van Driel

Managing Consultant

Dr. Marinus van Driel obtained his doctorate in Industrial/ Organizational Psychology from Florida Institute of Technology. He has a wide variety of organizational experience in both the private and public sector. Prior to his affiliation with TTS…

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Simon Hoare

Principal Consultant (Cape Town)

Simon Hoare holds the position of Principal Consultant at TTS. He is a registered Psychometrist with the HPCSA since 1992, registered Occupational Psychologist HPC-UK since 2009 and a Chartered Occupational Psychologist at the BPS since 1999. He is also affiliated with SIOPSA as….

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Vusi Mnguni

Consultant

Vusi is a consultant with TTS in Pretoria. Before working with TTS he was shareholder and Managing Consultant in BANETH Consulting, and a HR specialist with great wisdom and insight developed over more than 20 years experience across all the facets and elements of…

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Karien Stadler

Managing Consultant

Karien Stadler holds the position of Managing Consultant at TTS. She holds a Masters degree from the University of Stellenbosch and is a registered Industrial Psychologist. She is a member of the Society of Industrial and Organisational….

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Petra Brnova

Consultant

Petra Brnova is a Human Capital and Talent Management Consultant with a background in International Industrial/Organizational Psychology. Petra helps local and international organizations in achieving their mission by leveraging and developing their human capital through effective talent management, the …

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