Our Executive

Our Executive team brings a rich blend of skills and experience to Unison. They all have a shared passion for our vision and strong alignment with our values. 

Portrait of James King

James King


James is an experienced Project/Construction Management professional with strong leadership and interpersonal skills. He has a proven track record in achieving successful outcomes, leading project teams from inception to delivery.

James started his career in New Zealand delivering Government Housing and more recently in Melbourne working in consultancy as a client-side Project Manager/Superintendent. He has extensive experience in both commercial refurbishments/new builds and residential development covering bulking housing, greenfield land sub-divisions and high-end apartments.

James has a Bachelor of Business Studies (BSS) and a Diploma in Construction Management; and is also a Registered Builder.

Portrait of Unison Director for Housing and Homelessness - Sue Grigg

Sue Grigg

Director Housing and Homelessness

Sue Grigg has been working in housing and homelessness for over twenty years and has extensive experience working in the not for profit sector, for government and in research and consulting roles.

Sue has postgraduate qualifications in Social Planning and also brings to the Director’s role a passion for learning and practice development.


Portrait of Celine Savage

Celine Savage

Director Corporate Services

Celine heads the Risk and Compliance, Information Technology, Marketing and Communications and People portfolios. She is also the Company Secretary for Unison Housing Ltd and Unison Property Corporation.

Celine’s career spans roles in commercial real estate and the building regulatory space, as well as extensive experience in the not-for-profit sector. She brings expertise across a range of business administration functions, including strategic planning, governance, compliance, project management, reporting and business continuity.

Celine has a successful track record of initiating and managing change to strengthen service delivery, improve efficiencies, mitigate risks and optimise performance.

She holds a Masters in Business and Management and a Diploma in Quality Auditing.


Sheri Johnston 2

Sheri Johnston

Director Finance

Sheri has over 25 years of finance experience in Canada and Australia. Her career includes positions at a Big 4 audit firm, the banking sector and a not-for profit organisation dedicated to young people.
In Sheri’s diverse roles she has managed offshored teams, risk and compliance, legal and finance, acted as company secretary, implemented process improvement and change initiatives and delivered an organisation wide software project. Her passions include the development and mentoring of engaged, high performing teams and working within the not-for-profit sector.

She is a Chartered Accountant, holds a Bachelor of Economics and is a Fellow of the Governance Institute of Australia. Sheri also volunteers as a non-executive director on the Board of a not-for-profit organisation and a school.