Our executive team

Yarra Ranges Council is led by the Chief Executive Officer, who operates under the delegation of the elected Council and is responsible for the overall management and performance of all council operations, services and infrastructure delivery. The Chief Executive Officer, along with three directors, forms Council’s Executive Team.

Tammi Rose

Chief Executive Officer

CEO Tammi Rose  

Tammi Rose joined Yarra Ranges Council as Chief Executive Officer in 2019.  She is a passionate values based leader with 25 years’ experience working across public, private and not-for-profit sectors, with an exceptional track record in delivering strong outcomes for organisations and communities.

As an accomplished leader, Tammi has spent two decades working in local government and brings a wealth of experience from her time in regional, rural, interface, growth and metropolitan Councils.  She is a strategic and results orientated leader who enjoys forging enduring relations with the organisation, community and stakeholders, and possesses a strong reputation for engagement, innovation and astute financial management.

Tammi has successfully held a number of executive and senior leadership roles as well as non-executive roles, and prior to joining Yarra Ranges held the positions of Interim CEO, Director Corporate Services and Director Strategic Development at Hobsons Bay City Council.  An accountant by trade, Tammi is a qualified CPA, holds a degree in Commerce, a Masters in Organisational Development and is a Graduate of the Australian Institute of Company Directors.

Reporting directly to the CEO are the following three directorates:

  • Corporate Services
  • Social and Economic Development
  • Environment and Engineering

Mark Varmalis

Director of Environment and Engineering

 Mark Varmalis

Mark has been with Yarra Ranges Council since its formation in late 1994 and has more than 30 years of experience in local government.  He holds a degree in Civil Engineering and a Graduate Diploma in Municipal Engineering and Management.

Mark has a commitment to meeting community needs through improved infrastructure and service provision, whilst recognising that we must value and protect the unique natural environment of Yarra Ranges.

He also has a strong commitment for the advancement of staff in local government through the creation of networking, skills improvement, personal development and industry development opportunities provided by industry associations.

He is actively involved with the Institute of Public Works Engineering Australasia, previously holding board member roles at State and Australasian levels, and is currently a trustee with the Municipal Engineering Foundation Victoria.

Mark served at Yarra Ranges during and following the 2009 Victorian Bushfires, and has helped to lead the Directorate in the 10 years since. 

Vishantri Perera

Acting Director of Corporate Services

Vishantri Perrera

Vishantri commenced with Yarra Ranges in 2012. She brings extensive experience working as an accountant in the private sector to her work in finance in local government and to her role as Acting Director of Corporate Services.

Vishantri started her working life as an accountant in the telecommunications industry in Sri Lanka before migrating to Australia in 2000, where she worked with an advertising firm before moving into local government.

She has held a number of finance-related positions at City of Port Phillip and Glen Eira City Council before starting with Yarra Ranges Council in 2012 as a Senior Financial Accountant.

With a background in the private and public sectors, Vishantri is interested in getting the most out of her directorate and making improvements to Council’s internal processes to deliver the best results for the Yarra Ranges community, while ensuring services are efficient and cost-effective.

James Collins

Acting Director of Social and Economic Development

James Collins


James is currently the Director Social and Economic Development at Yarra Ranges Council and has over 15 years of senior leadership experience in both the public and private sectors.

His current portfolio is diverse covering planning, aged and disability, arts and heritage, economic development, tourism, family and youth, community development, local laws, emergency management, environmental health and libraries.

James has a demonstrated capacity to create a positive and progressive workplace, and drive a culture of improvement and innovation.

He holds a Masters of Business and is a Graduate of the AICD Company Directors Course.

James also sits on a number of industry and Not for Profit boards.