View the GRX25 Speaker Lineup Events and sessions across GRX25 are led by a mix of local and international speakers from across multiple sectors. Search Search Search We're sorry, but we couldn't find any results that match your search criteria. Please try again with different keywords or filters. Loading Loading All 0 - 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Letter O James O'Loghlin Broadcaster, Author and Innovation Expert Mark O’Brien Chair Global Mining Guidelines Group (GMG) Max Ong Principal Projects Officer, Technology Byrnecut