In 2018, BMG added Rustenburg Engineers and Joerg Foundry to its long list of recent acquisitions. This is the first time that BMG, part of the Engineering Solutions Group (ESG), has ventured directly into the foundry industry. ESG is the business segment of Invicta Holdings Ltd., an investment holding and management company that is listed on the Johannesburg Stock Exchange (JSE).
In April 2019, Rustenburg Engineers and Joerg Foundry amalgamated under the single umbrella of Rustenburg Engineering & Foundry (REF). The manufacturing facilities at REF (Pty) Ltd. include a no-bake resin sand foundry for jobbing and short runs, a greensand foundry for production runs, and a fully-equipped engineering workshop.