Meet Our Team

ACOS is built on passion for learning, diversity and providing the highest
standard of education in Australia.

ACOS' Chief Executive Officer

Dr Lionel Chang

Our leadership draws on the academic and medical expertise of Dr Lionel Chang, [MB BS FRACS], a specialist plastic surgeon and the managing director of ACOS. With over 30 years experience in the Australian healthcare industry, Dr Chang’s esteemed reputation and extensive experience in the public and private health system further demonstrates ACOS’ commitment to create the finest learning environment in vocational teaching, program delivery and practical training.

Roohi Rehman

CRICOS and Training Manager

Reginald Mangilit

Business Analyst ICT

Shiarrah Gayle Menguin

Advertising Specialist/Student Support Officer

Christelle Espinosa

Office Manager/Student Support Officer

Irshad Cader

Trainer & Assessor - Leadership and Management & Business

Mark Byron

Trainer & Assessor - Ageing Support

Deepak Garg

Trainer & Assessor - Disability & Individual Support

Zinnatun Nesa

Trainer & Assessor - Community Services

Nazia Begum

Trainer & Assessor - Community Services & Mental Health

Ehteshamul Hoque

Trainer & Assessor - Hospitality, Event and Hospitality Management

Pooja Jaidka

Trainer & Assessor - Early Childhood Education and Care

Sabina Harrouk

Trainer & Assessor - Community Services & Early Childhood Education and Care

Owen Chang

Data Analyst

The Australian College of Studies acknowledges the Darug People, the Traditional Custodians of the land on which our Parramatta campus stands.

We pay our respects to Elders past, present and emerging, and extend that respect to all Aboriginal and Torres Strait Islander peoples who visit, study, or work with us.


We recognise their enduring connection to land, waters, culture, and community, and honour their continuing contributions to education and learning across Australia.