Sonja started her interior design career in 1989 working in varied roles within the building and design industry. In 1999 Sonja started her own interior design business called Archertec Interiors.

For over 20 years she has managed the business leading her design team to complete many successful and award winning projects from commercial interior design and workplace design to multi-unit residential developments, hospitality, retail fit-outs and high end residential design.

Between 2014 -15 Sonja joined Cox Architecture to take on a business development and design management role within the interiors team. As an Interiors Lead and design professional in the industry Sonja was responsible for overseeing and mentoring the interiors team as well as maintaining and building strong relationships with the clientele of Cox Architecture.

Sonja has won multiple industry design awards from industry organisations such as HIA, MBA and APPA since 2002. In 2007 Sonja was awarded a Fellowship with the Design Institute of Australia and in 2009 won Professional Consultant of the Year at the Master Builders & Boral Awards.