MBA (University of Technology Sydney), MA (Macquarie University), ALCA (Charles Sturt University), FAICD Mark joined nib in October 2002 as Chief Executive Officer. In 2007 as Managing Director, he led nib through its demutualisation and subsequent listing on the Australian Securities Exchange (ASX). nib later joined the S&P/ASX 100, among Australia’s largest and best-known companies. Mark has held executive positions at a number of Australian organisations, including local government and peak industry bodies.
Leading nib, Mark has transformed the business from a regionally based (Newcastle, NSW) private health insurer into one of Australia’s fastest growing and innovative healthcare companies with adjacent businesses in New Zealand, travel, inbound international students and workers, and a growing interest in Australia’s National Disability Insurance Scheme (NDIS) sector. Mark’s strategic focus has been to build and diversify nib’s business and with that, earnings. nib has grown significantly in recent years, organically and inorganically, in existing and new markets.

Dr Rachel David is a highly experienced CEO with outstanding skills across a broad range of disciplines. Her expertise and commitment to improving the quality, affordability, and access to health care in the Australian system is unsurpassed. Initially trained as a medical doctor Rachel gained first-hand insights into the challenges of healthcare and in the past two decades has devoted much of her career to advocating for reform to improve healthcare financing, entrench evidence-based medicine and protect Australian consumers by ensuring they pay a fair price for quality care. Rachel is not afraid to call out inappropriate healthcare practices, system rorting and inappropriate conduct by powerful vested interests like the big multinational medical device companies, always with the objective of bringing about better outcomes for patients and their families. An expert in government relations and the workings of the Australian Parliament and financial systems, Rachel is well respected across political boundaries. She is an experienced Company Director, and currently sits on the Board of the CRC for Mental Health. Skilled in financial services, she is an advocate for women in financial services, and an expert in healthcare financing, billing and payments. One of her key goals is to keep private health insurance premiums affordable for Australian families, and by doing so reduce pressure on our public hospital system so all Australians can have access to quality care. Rachel is a strong advocate for quality mental health care, preventive health and wellbeing, as well as general health system reform. She has achieved outstanding results on behalf of Australian consumers.

Joanne Kadlecik, the current CEO of Defence Health, has been leading the organisation since November 2022. Prior to her appointment as CEO, Joanne had a successful eight-year tenure as the Chief Operating Officer, focusing on member experience, servicing teams, and technology functions to drive growth and transformational change. With an impressive 25 years of experience in the insurance and business process outsourcing industries, Joanne has consistently demonstrated her ability to oversee technology, direct contact centres, and shared service operations

Rebecca Windsor first joined Australian Unity in 2002 and has over 20 years of executive experience leading strategy, commercial, operations and advocacy work across the financial services and private health insurance sectors. Prior to her appointment as CEO of Australian Unity’s private health insurance business, Rebecca was involved in developing and driving key strategic activities for the broader Australian Unity group of businesses. Her past positions have included General Manager—Health Management and Head of Health Governance. Rebecca is a passionate advocate for industry cooperation and reform to improve affordability, sector sustainability and the building of a stronger health system.