Management

Tim Sanford Interim CEO (RMMCL) and Corporate Secretary (RMMPLC) P. Eng.

Mr. Sanford has over 25 years of experience at various supervisory levels and throughout his career has been involved in all aspect of underground mine development and production. Tim is a member of Professional Engineers and Geoscientists Newfoundland and Labrador (PEGNL).


Tim joined the company as Chief Engineer in March 2010 and accepted the position of General Manager early in 2011. In November 2012, Tim was promoted to VP Technical Services with the responsibility of overseeing all technical aspects of the Company. Most recently, Mr. Sanford has also assumed the Corporate Secretary responsibilities for the Company.

Celeste Van Tonder Chief Financial Officer

Celeste is a Chartered Accountant with more than 15 years of natural resource experience having started her post-audit career with Anglo American and African Rainbow Minerals. Her most recent position was as CFO for ASX listed TerraCom Resources Limited.  She is a specialist in the development of junior listed companies with AIM experience and expertise in the establishment of financial processes, reporting systems and implementation of risk and governance.

Gus Simbanegavi Vice President and General Manager

Mr Simbanegavi is Mining Engineer with over 25 years experience. Prior to joining Rambler Mining and Metals in May 2022, he was Chief Operating Officer and Director of AIM listed Bluerock Diamonds where he was instrumental in the feasibility, development, and construction of a 1.0Mtpa diamond mine and processing plant in South Africa. Prior to this, he has held various senior executive management roles in Southern Africa across a diverse range of commodities which include Gold, Platinum, Nickel, Zinc and Diamond.

Bonnie Matthews Vice President of Human Resources

Ms. Bonnie Matthews joined Rambler Metals and Mining in 2018 as the Human Resources Manager. She brings to our team over 20 years’ experience in many aspects of a Business and for the past 10 years primarily in mining. Bonnie’s educational background is in Business Management Human Resources/Executive Administration and is currently completing a Bachelor’s Degree in Human Resources Labor Relations. Prior to Rambler Bonnie has held several Management/HR positions including positions with Tata Steel Minerals Canada, Canada Post, Grey Rock Mining, and The Government of Nunavut. Bonnie is an advocate for women in mining and inspires and encourages all women to reach for their goals.