Mike Brook graduated with a Bachelor of Science in Mining Geology from the University of Wales in 1981. He joined MIM Holdings Limited in Queensland in 1983 as a mine geologist in the copper and lead-zinc-silver operations, progressing to become Chief Geologist for the copper mining operation.
Mike joined stockbroker JBWere & Son in 1993 as a resource analyst specialising in emerging resource companies in the gold, base metals and mineral sands sectors. His research was recognised by the industry with an award from the Australian Gold Council for best junior company research in Australia in 2000. Mike joined the Lion team in 2001 as Manager African Funds. Mike became an executive director of Lion Manager Pty Limited in August 2004.