Our Team


Mayor Sam Ngai

Sam has lived in Roseville, Killara and East Lindfield for the last 37 years. He attended Roseville Public School and his wife attended Lindfield Public School. They met through their local church and together have three young daughters. All four of their parents live in Roseville.

Sam has four degrees in Software Engineering, Accounting, Environmental Law and Business Administration at UNSW. He is also a Fellow at CPA Australia and graduated at the Australian Institute of Company Directors with Order of Merit (top 3% of participants).

Prior to becoming the 2024 Mayor, Sam worked in a range of finance, strategy, risk and governance roles at Origin Energy supporting the delivery of renewable and thermal energy projects. He currently serves as a Director at StateCover Mutual, a Local Government insurer.

Sam and his wife also run a wedding and family portrait photography business; they understand and care about small business.

Outside of council, Sam volunteers as the Treasurer at East Lindfield Community Preschool and in children’s ministry at St Barnabas Roseville East. He previously served as Secretary at KYDS Youth Counselling Lindfield.


Kath Johnson

Kath has lived in Roseville for over a decade. She studied Arts / Law at Macquarie University as well as a Management Certificate at TAFE.

She recently retired after 22 years of running her own consulting business in the field of Immigration Law, which involved listening to people and helping them achieve their dream of becoming Australian Citizens.

Kath’s interests lie in maintaining the bush ambiance of the area, the transition towards future energy, and engagement with local events, particularly investing in our local children.

Kath is ready to serve the residents of Roseville and Lindfield. She has the available time, and with her experiences as a lawyer and business owner she is keen to listen to your concerns and advocate for solutions on your behalf.