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Meet the Experts Elevating African Healthcare
A Team of Passionate Professionals
Dedicated to Quality and Patient Safety

Based in Cape Town, COHSASA’s expert African team – nurses, doctors, radiographers, administrators, and quality specialists – brings decades of continent-specific experience. We tackle the unique healthcare challenges of our continent, empowering facility teams to deliver safe, high-quality care. Your success drives our mission to elevate African healthcare standards.

Our Team

Our COHSASA People
Jacqui Stewart
CEO
Jacqui Stewart, COHSASA CEO, holds an MPS in Health from Middlesex University. A registered nurse with UK and SA experience, she became CEO in 2016 after joining in 2005 as Chief Operations Manager. An ISQua Expert, she's a member of the International Academy of Quality and Safety in Health Care and serves on the ISQua EEA Accreditation Council. She received ISQua Life Membership in 2024.
Jacqui Stewart
CEO
Jacqui Stewart, COHSASA CEO, holds an MPS in Health from Middlesex University. A registered nurse with UK and SA experience, she became CEO in 2016 after joining in 2005 as Chief Operations Manager. An ISQua Expert, she's a member of the International Academy of Quality and Safety in Health Care and serves on the ISQua EEA Accreditation Council. She received ISQua Life Membership in 2024.
Marilyn Keegan
Communications and Resource Mobilisation
Marilyn Keegan studied for a BSc nursing degree at WITS and has a BA in Communications and a BA Hons in English literature.  She was the health reporter for the Rand Daily Mail. As an award-winning journalist, she has a wide knowledge and understanding of media and been a senior writer for national newspapers and magazines in South Africa. Marilyn is responsible for corporate communications.
Marilyn Keegan
Communications and Resource Mobilisation
Marilyn Keegan studied for a BSc nursing degree at WITS and has a BA in Communications and a BA Hons in English literature.  She was the health reporter for the Rand Daily Mail. As an award-winning journalist, she has a wide knowledge and understanding of media and been a senior writer for national newspapers and magazines in South Africa. Marilyn is responsible for corporate communications.
Dr. Giel van Schalkwyk
Chief Surveyor
Dr. Giel van Schalkwyk, COHSASA's Chief Surveyor for over 20 years, manages and conducts healthcare facility surveys, develops surveyor training, and contributes to accreditation standards. A medical doctor with an MMed, he transitioned into healthcare administration in 1991.
Dr. Giel van Schalkwyk
Chief Surveyor
Dr. Giel van Schalkwyk, COHSASA's Chief Surveyor for over 20 years, manages and conducts healthcare facility surveys, develops surveyor training, and contributes to accreditation standards. A medical doctor with an MMed, he transitioned into healthcare administration in 1991.
Dr. Leonard Londa
Quality Improvement Manager
Dr. Leonard Londa joined COHSASA in 2019, leading the Quality Improvement Unit. He obtained his medical degree in DRC in 2008. Prior to COHSASA, he served as a Medical Officer in Lesotho and later as a program manager and master trainer for JHPIEGO.
Dr. Leonard Londa
Quality Improvement Manager
Dr. Leonard Londa joined COHSASA in 2019, leading the Quality Improvement Unit. He obtained his medical degree in DRC in 2008. Prior to COHSASA, he served as a Medical Officer in Lesotho and later as a program manager and master trainer for JHPIEGO.
Sharon Wilson
Accounts Manager
Sharon Wilson, COHSASA's Administration and Support Lead, began as a diagnostic radiographer before moving into financial and IT management. With extensive experience as a senior bookkeeper, she holds qualifications in accounting, bookkeeping, payroll tax, and business systems analysis.
Sharon Wilson
Accounts Manager
Sharon Wilson, COHSASA's Administration and Support Lead, began as a diagnostic radiographer before moving into financial and IT management. With extensive experience as a senior bookkeeper, she holds qualifications in accounting, bookkeeping, payroll tax, and business systems analysis.
Mtisunge Chiotha
ICT Coordinator
Mtisunge Chiotha leads COHSASA's ICT unit, overseeing informatics, knowledge management, data, and helpdesk support. She holds a BSc (Hons) in Computing and Information Technology and joined COHSASA in 2010 after working as an Applications Support Engineer.
Mtisunge Chiotha
ICT Coordinator
Mtisunge Chiotha leads COHSASA's ICT unit, overseeing informatics, knowledge management, data, and helpdesk support. She holds a BSc (Hons) in Computing and Information Technology and joined COHSASA in 2010 after working as an Applications Support Engineer.
Nadine Joubert

Data and Helpdesk Supervisor

Cheryl Adams

Knowledge Management and Systems Coordinator

Kefuoe Qwela

Databank Clerk and Helpdesk Operator

Noleen Davids

Databank Clerk and Helpdesk Operator

Firdousa Ajouhaar

Project Manager / Quality Advisor / Surveyor

Laetitia Antonides

Accounts Assistant

Roselyne October

Travel Coordinator

Gabriel le Roux

Quality Advisor / Surveyor

Petra Sewing

Quality Advisor / Surveyor

COHSASA
Board

Our Board brings together leading healthcare and business professionals and academics who provide leadership for our strategic direction and carry out their fiduciary responsibilities to enable maximum and consistent performance from COHSASA.

Our Board Members
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