About us

Terra Drilling provides quality, safe and efficient surface diamond drilling throughout Australia, including core, directional, metallurgical and geotechnical drilling services.

Terra Drilling's employees have vast experience in providing accurate directional drilling services with safe and well maintained rigs, state-of-the-art survey gear and support equipment.

Jeremy (Toad) Dowdall

Director / General Manager

Jeremy's background and experience in drilling is the foundation of the company. With an industry-wide reputation as an experienced and skilled driller, Jeremy brings more than 27 years experience as a driller and site supervisor to his role as General Manager.

Joining the drilling industry in the late 1980s as a drilling assistant with WMC, Jeremy worked his way up to senior driller before moving on for a short time with Aquadrill. In the mid 1990s Jeremy joined GFWA as a driller before joining Ausdrill where, for more than 10 years, he worked as a diamond driller and drilling supervisor.

With Jeremy’s extensive knowledge and experience within the drilling industry, he is your first point of call for contract specifics, technical support and performance recommendations. He is passionate about his company and has continual repeat business and many testimonials from current clients to back this up.

Jonnathon Defrenne

Operations Manager

Jonnie started in the drilling industry in 1993 with WMC, working up to driller then transferring over to Ausdrill till 2001, then to work for Barminco underground diamond drilling at Kanowna Belle. Promoted to Supervisor 6 months later and spent a year supervising at Kanowna Belle and Wiluna underground operations. Moved to UK at the end of 2002 working for a small drilling company, working on different building sites throughout the country. Spent two years with Westcore as a driller then to supervisor. In mid 2006 with the help of his wife, ran their own business until the end of 2008 and then moved to Perth.

Commenced with Terra Drilling in 2011 where he started as a Supervisor and now to his new role as Operations Manager.

Wayne Varian

HSEQ Advisor

Wayne is a qualified HSEQ and training practitioner and has worked across multiple sites leading and developing drilling operation teams, as well as strategically aligning safety and training performance and initiatives.

In particular he has a contractor management and field based safety background (30+ years), working on behalf of major drilling companies (including drilling/exploration and processing plants), working to achieve collaborate solutions towards a safety culture of best practice.

Wayne's professional and thorough approach has enabled Terra Drilling to establish and maintain a disciplined and comprehensive safety management system.

Patricia Dowdall

Director / Office Manager

Patricia has worked in the mining industry for the last 20 years and has significant experience in both large and small business operations. Prior to proudly becoming a Director of Terra Drilling, Patricia held site based administrative roles at both Barrick Operations and locally as KCGM. She brings with her a wealth of knowledge in office administration and looks forward to liaising with our core business partners.

Matt Duckworth

Business Development Manager

Matt has been involved in the Mining & Exploration Industry for the past 18 years. During this time, he has worked in various locations throughout Western Australia, holding a variety of roles and has gained multiple experiences within the many facets of the Industry. These include Exploration (Greenfields/Brownfields), Mining Surface/Underground & Processing Operations. Matt has provided consistent methods to ensure HSEC obligations (ISO Accreditations) are met with a strong emphasis on contract negotiation, management & execution of various contracts (Drilling, Geophysics, Earthworks) involved in the Exploration Industry.