In November 2017, the LDAA formed a board to further enhance our position as the peak body in Australia.

Our current Board Members:

Sharon Whiteman, President & CEO

Lyme LDAA - CEO Sharon Whiteman

Sharon has worked in the field of health and wellness for almost 40 years. She was a Clinical Nurse Specialist in Critical Care for almost 20 years and previously ran a nutrition and wellness business for over 20 years.

Sharon has been involved with the LDAA since its inception in 2009 and while officially fulfilling the roles of president and CEO, she applies herself to ‘whatever is needed’ to the best of her ability.

She has almost 30 years’ experience leading teams of volunteers from all walks of life, who have appreciated her ethics, calm manner, commitment to staff development and engaging style. Despite being a recovering patient herself, Sharon has been a tireless campaigner of justice for patients with Lyme disease. Sharon is a beacon of hope and inspiration for the LDAA team. 


Maree Kratzer, Vice President

Lyme LDAA - Vice President Maree Kratzer

Maree is a recovering Lyme patient. She has a BA English major, was recognised on the Dean’s Honour List multiple times and is a qualified naturopath with a passion for science.

During the 20 years Maree worked in health and wellness, she trained naturopathic students in the Student Clinic at the Southern School of Natural Therapies, ran her private practice and worked in Allied Health at St Vincent’s and Epworth Freemasons hospitals.

Voluntary community work has always been a part of Maree’s life, supporting her children’s schools and church community while her children were young. Becoming part of the community of Lyme and mould affected patients 7 years ago, Maree was inspired by the LDAA’s advocacy work. Her massive contribution to the LDAA since 2017 is deeply appreciated.


Ann-Maree van Dalen, Secretary

Lyme LDAA - Secretary Ann-Maree van Dalen

Ann-Maree has worked in education for 29 years, primarily in her favoured area of special education. She has worked internationally as a teacher, teacher-in-charge of a Special Education Developmental Unit and an Assistant Director of an ABC Learning Centre.

A dedicated and active member of the community, Ann-Maree is also a kinship carer as part of Foster Care Queensland and has been a secretary and member of her children’s kindergarten committees.

Ann-Maree attributes the diagnosis and successful treatment of her daughter’s Lyme disease to the LDAA’s guidance. As a result, wanting to support the same for others, she has volunteered with us since 2014.

Her consistent dedication and keen discernment have been key to the solid foundation of the LDAA board. As a mother and special education teacher, Ann-Maree is committed to communication, organisation and teamwork; exactly what we need in a secretary.  


Chao Cheng, Treasurer

Lyme LDAA - Treasurer Chao Cheng

Chao is a CPA with academic awards including the “Dean’s Commendation for High Achievement” and Dean’s Honour Roll for outstanding academic excellence at the University of Queensland. He has 15 years’ professional experience including 3 years with accounting firms and over 14 years in the healthcare industry. With a passion for leadership, he has 11 years’ experience as a member of a 3-member executive team in private hospitals with $70m turnover and over 600 employees. He supports 70 hospitals across Australia as well as managing over 20 accountants.

His skills include cost centre reports, financial modelling, monthly reconciliation reports to the CEO, training and development programs, ensuring KPIs are met according to operational requirements.

Fluent in Mandarin Chinese and English, Chao’s personal passions include badminton, his young family and he’s looking forward to contributing to the community through his board role.  


Mark Treviranus, Board Member

Mark is an experienced business professional with over 15 years in Marketing and business management positions. He holds a Bachelor of Business Studies (Marketing)/Bachelor of Arts (Statistics) and has held a number of executive leadership roles in Australia and New Zealand. 

Mark has a flair for all things brand and marketing. His demonstrated ability and proven success in this space, coupled with his personal experience of Lyme, makes him the perfect complement to the LDAA board and its mission.


Jane Lockton, Board Member

Lyme LDAA - Board Member Jane Lockton

Jane is a Registered Nurse and has worked in health for over 35 years. She has worked in a range of roles and environments, mainly focussed around child and family health. She is now also a Provisional Psychologist, and is currently completing a combined Masters/PhD in psychology. The focus of her PhD is grief and loss.Jane has been involved in voluntary community work for many years, including refugee support, new parent support and disability carer support.

She has previous board and executive committee roles. She is also a founding director of the Wellbeing Village Collective Project, a not for profit organisation supporting teens experiencing mental distress. As a long term but only recently diagnosed Lyme patient, she is keen to use her experiences and skills to support and advocate for the Lyme community.


View the LDAA Constitution