Our People

Leaders and Principals

Gerry Doyle

Gerry Doyle

Chief Executive Officer

Tim Ennis

Tim Ennis

Clients and Growth Lead

Baseel Mohamed

Baseel Mohamed

Chief Financial Officer

Krystal Kovac

Krystal Kovac

General Counsel

Hayley Lokan

Hayley Lokan

Workforce Capability Lead

Mark Baker

Mark Baker

NSW Operations Manager, Principal Structural Engineer

Tom Oliver

Tom Oliver

QLD Operations Manager, Principal Structural Engineer

Carmen Wentrock

Carmen Wentrock

Operations Manager SA & VIC

Melinda Lutton

Melinda Lutton

Assistant Operations Manager / Principal Civil Engineer

Adrian Calabria

Adrian Calabria

Structural Drafting Lead - NSW

Andrew Morrison

Andrew Morrison

Principal - Design and Drafting

Andrew Seaton-Stewart

Andrew Seaton-Stewart

Leader Riverland Region, Principal Structural Engineer

Benson Ou

Benson Ou

Civil Team Leader - NSW

Catherine Brock

Catherine Brock

Water Lead - SA/VIC

Christina Bruno

Christina Bruno

Clients and Growth Lead - Local Government

Dan Walsh

Dan Walsh

Transport Lead

Elsie Mann

Elsie Mann

Clients and Growth Lead - Water

James Farrall

James Farrall

Principal - Transport Structures

Jeff Tyler

Jeff Tyler

Principal - Water and Development

Jordan Neis-Beer

Jordan Neis-Beer

Geotechnical Lead

Katie McAllister

Katie McAllister

Development Lead - QLD

James Arnold

James Arnold

Traffic Lead

Luke Boin

Luke Boin

Assets and Spatial Lead - SA

Mal Wilkinson

Mal Wilkinson

Mining Lead

Matthew Scott-Toms

Matthew Scott-Toms

Principal - Water and Mechanical

Patrick Tunnah

Patrick Tunnah

Water Lead - QLD

Paul Davies

Paul Davies

Civil Design Lead - SA/VIC

Ricky Worn

Ricky Worn

Structures Lead - QLD

Rod Ellis

Rod Ellis

Principal - Infrastructure Management

Russell Howell

Russell Howell

Maritime Lead

Rohan Naidu

Rohan Naidu

Water Lead - NSW

Saad Haque

Saad Haque

National Lead - Environment & Sustainability

Savas Christoforidis

Savas Christoforidis

Principal Structural Engineer

Stuart Croser

Stuart Croser

Automotive Lead

Tim Kerby

Tim Kerby

Stormwater Lead - SA

Tim Thiel

Tim Thiel

Local Government and Development Lead - SA/VIC

Trent Phillips

Trent Phillips

Leader South East Region, Principal Structural Engineer

Tyson Radetti

Tyson Radetti

Principal – Roads and Traffic

Tim Ennis

Clients and Growth Lead

Tim is a key member of Tonkin’s executive leadership team. He is responsible for leading Tonkin’s client and growth strategies. A skilled senior civil and structural engineer, he brings significant experience in consultancy works and project management for public and private sector clients across Australia. Having worked on multidisciplinary projects, Tim brings holistic insights to developing tailored evidence-based, needs-driven solutions that meet our clients needs.

Highly focussed, with a strong track in delivering exceptional project and business outcomes, Tim led the successful integration of Tonkin with TLB engineers following the 2018 merger. Prior to that he successfully established Tonkin’s Mildura office – the company’s first office in Victoria. Tim enjoys working in a team and his engaging personality enables him to develop strong working relationships with colleagues and clients alike. Tim’s ability to translate his engineering knowledge to a broad range of stakeholders and recognise other people’s working styles means he consistently establishes and maintains high-performing teams.