you can’t change want you don’t measure


Dr. Johann Van Zyl is a qualified and duly registered medical practitioner, holds MB ChB and MBA degrees and specialises in clinical and financial risk management, related health policies, healthcare data analytics and strategy development.

Dr. Johann obtained his MBA degree majoring in strategic management. He has been working in the private medical scheme industry for almost the past two decades, following an initial ten-year stint in private general medical practice. He worked as a medical superintendent of a medium-sized provincial hospital, headed up the Private Practice Unit of the South African Medical Association, was employed in senior management positions in the managed healthcare industry, was a principal consultant at Willis Towers Watson (formerly Fifth Quadrant Actuaries and Consultants) until March 2017 and has been offering healthcare consulting, data analytical and related services for the past twelve years. He is currently offering consulting services through his own consulting business, Clinical Governance Services in South Africa and Namibia.


The Team:

Zerilda Barreiro
Operations Manager


Drikus Viljoen
Clinical Coding Specialist


Mariori Jonker
Data Analyst


Starting her career as Industrial Engineer, Marlize transitioned into business and has a firm background in business operations, applying suitable technologies and assuring data and solution integrity. She obtained a B.Eng (Industrial Engineer) degree from the University of Pretoria

Over the years she’s been involved in applying technology in numerous industries and gained a wealth of knowledge and experience in these fields. Her career started with productivity improvement projects and supply chain optimisation activities in the truck manufacturing industry. She then got involved in the Pharmaceutical and FMCG industries where IT systems had to be enhanced to drive the optimisation of their supply chains.

Marlize’s passion lies in optimisation and continuous improvement of processes and supply chains. She enjoys data analysis and providing perceptive outcomes. Her combined knowledge, passion and attention to detail allows her to make a positive contribution in any project.


Dr. Johann is a medical practitioner by training and the founder/owner of Clinical Governance Services (CGS).


Dr. Johann has 12 years’ experience as a general practitioner coupled with some 19 years’ experience in health management, managed healthcare, health analytics and clinical and procedure coding. He specialises in clinical and procedure coding and the clinical analysis of health claims data.

Dr. Johann advises medical schemes, healthcare service providers, medical practitioners and corporate clients on the development, implementation and monitoring of clinical risk management strategies and has a passion for finding mechanisms that will ensure access to appropriate care leading to optimal health outcomes.

Dr. Johann has a particular interest in the measurement of the quality of health provided and received, together with the associated health outcomes. He has been the lead consultant to Health Quality Assessment (HQA) for the last eight years and has been instrumental in the development of HQA into an authoritative provider of health quality information. He has presented at numerous conferences on the topic of health quality measurement.

Education and Credentials

Bachelor of Medicine and Bachelor of Surgery (Studies in Medicine – University of Stellenbosch)

Master’s in Business Administration (University of Stellenbosch)

Registered with the Health Professions
Council of South Africa

B.Eng (Industrial Engineer)
(University of Pretoria)