At Valenza Engineering, people come first. Our team includes experienced hydrogeologists, groundwater modellers, water and hydraulic engineers. As the company grows, we are committed to attracting, developing and retaining the right people who are highly competent, live the company’s values and actively contribute to our long-term success.

Valenza Engineering personnel are members of internationally recognised professional organisations, e.g. IAH, International Association of Hydrogeologist. Principal personnel have between 20 and 30 years experience and are Chartered Professionals from Engineers Australia and Overseas Engineering bodies.


Alexis Valenza

Director / Principal Hydrogeologist

Peter Gribbin

Technical Director

Process Team

Andrea Yarce

Process Engineer

Anamaria Ardila

Process and Procedure Engineer

Engineering Team

Steven Abdelshahid


Riefqy Usman


Rama Herawan


Operations Team

Silvia Serra

Marketing Executive

Dina Christianti

Administration Assistant

Sarah Cassells

Assistant to Executive Director

Carly Coote