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

Gerry Doyle

Chief Executive Officer

Gerry is the Chief Executive Officer of Tonkin and is responsible for implementation of the organisation’s external strategy and developing ongoing business relationships. He has gained broad and practical experience in the design and project management of water supply and wastewater projects in South Australia. Since being appointed as CEO in 2011, Gerry has been instrumental in spearheading the notable growth and expansion of Tonkin. With a strong focus on building a culture of delivering exceptional outcomes, inspiring people to create a brighter future as well as encouraging them to be the best they can be, Gerry’s skills in bringing the right people together coupled with his strategic insights makes him a remarkable business leader. 

Gerry has been on the Board of Consult Australia for three years, including one year as deputy president, and in that time, he has made a significant contribution to putting the spotlight on mental health issues in the workplace. Gerry is the Chair of the Mental Health Working Committee of Consult Australia and has been a driving force behind their activities aimed at helping businesses to create mentally healthy work environments. 

Gerry is an active member of Engineers Australia and also on a number of other committees.