Our people

Meet the executive and the people who look after your water, sewerage and catchments. To contact the Authority, call 1800 975 707 or use the contact form.

Maren Tillbrook

Chief Executive Officer
Executive

Maren has led Tolmerra Water Authority since 2021 and reports to the Board.

Darius Pemberton-Hale

Chief Operating Officer
Executive

Darius looks after everything that happens between the reservoir and your tap: treatment, pumping, mains repairs and the field crews.

Ilse Varga

Chief Financial Officer
Executive

Ilse is the Chief Financial Officer. She is responsible for the budget, pricing proposals, procurement and the annual accounts.

Tomasz Reyes-Whitlock

General Manager Customer and Community
Executive

Tomasz leads customer service, communications and community engagement.

Anneliese Okonkwo

General Manager Engineering
Engineering

General Manager Engineering. Anneliese's team plans and builds the pipes, pumps and tanks the region will need over the next thirty years.

Callum Ferreira-Doyle

Manager Water Treatment
Operations

Callum runs water treatment at Wattleford, Brindlemere and Karrabee. He trained as a chemist, switched to operations in his twenties and has never regretted it. Ask him about algae and he will talk for an hour.

Soraya Linden

Senior Water Quality Scientist
Catchments and environment

Soraya manages the water quality laboratory, where her team tests more than a thousand samples every quarter and reports the results in plain English.

Beau Nakamura-Stirling

Catchment Program Lead
Catchments and environment

Beau works with landholders, Landcare groups and Traditional Owners to protect the Upper Tolmerra catchment.

Wilhelmina Achterberg

Customer Service Team Leader
Customer service

Wilhelmina has answered phones, emails and counter queries since 2011 and now leads a team of eighteen.

Faisal Oduya

Hardship and Concessions Officer
Customer service

Faisal helps customers who are struggling to pay their bills. He is a trained financial counsellor, speaks Arabic and English, and keeps conversations confidential. If you are worried about a bill, call early.

Gwendolyn Hartigan-Moss

Senior Network Planner
Engineering

Gwendolyn is a Senior Network Planner. When a developer proposes a new estate, she models the pressure, flows and storage it will need and tells us whether the existing network can cope.

Rafael Thornbury

Field Services Supervisor
Operations

Rafael supervises the field crews who fix bursts, replace valves and respond to faults, day and night. Nineteen years in, he still joins the night callouts when the roster is thin.

Ottoline Prasad

Recycled Water Operations Lead
Operations

Ottoline runs the Saltpan Bay Recycled Water Plant and the network that carries its water to farms, parks and industry.

Jasper Lindqvist-Ngata

Communications Manager
Corporate services

Jasper manages the website, media enquiries and community notices. If you have read a news item, a fact sheet or a planned works letter from us, his team probably wrote it.

Marguerite Dalgleish

People and Culture Manager
Corporate services

Marguerite looks after recruitment, training, wellbeing and workplace relations for 214 staff, and leads the graduate and apprentice program.

Kenji Abernethy-Rowe

Environmental Compliance Officer
Catchments and environment

Kenji manages the Authority's environmental licences and monitoring, and writes the annual environmental performance report. Most days he can be found at a creek or a discharge point with a clipboard.

Saoirse Valdivia

Asset Management Engineer
Engineering

Saoirse is an asset management engineer. She combines condition data, burst history and sensor readings to decide which pipes and pumps to renew first, and she holds a master's degree in infrastructure management.

Lachlan Okafor-Brandt

Information Systems Manager
Corporate services

Lachlan leads digital services, including the online account portal and this website. He is the person to contact about broken links, odd page behaviour and accessibility issues.

Piper Kowalczyk-Adeyemi

Education Officer
Customer service

Piper is a qualified primary school teacher who now runs the Youth Water Ambassadors program, visiting about twenty-two schools a year. Her favourite lesson involves a bucket, a sponge and a lot of splashing.

Emeric Saldanha

Trade Waste Officer
Operations

Emeric is the Trade Waste Officer. He visits cafes, factories, workshops and car washes across the region to help them keep fats, oils and chemicals out of the sewer, and he rarely leaves without a coffee.