Financial Results Presentation

Corporate Strategy CORE BUSINESS: MINING SERVICES INDONESIA AUSTRALIA Delta Dunia ADJACENT GROWTH PILLARS DIVERSIFY: COMMODITIES Build our mining services capabilities, as a mine owner and operator Strategic acquisitions to expand DOID's portfolio to include other commodities (initially copper) ◉ US$m, US$m, unless FY18³ FY19 FY20 FY21 FY18 FY19 FY20 FY21 unless stated² ■ stated' OB Removal OB Removal 393 380 282 326 149 172 169 146 (MBCM) (MBCM) Revenue ex. 822 824 557 911 Revenue 362 356 392 385 fuel EBITDA 298 236 164 234 EBITDA 56 52 74 80 % margin³ 36% 29% 29% 28% % margin 15% 15% 19% 21% BUMA is Indonesia's second largest mining contractor, with a ~15% market share BUMA averaged ~350MBCM for the last 4 years Established, long-term contract base, with current orderbook of ~US$6.5bn BUMA has actively expanded its contract base, targeting first quartile mining operations Dominant positions with, Adaro Energy, Bayan Resources and Berau Coal Energy " The completion of the Downer Mining East (BUMA Australia) acquisition expands our core business another key mining jurisdiction Adds 160MBCM capacity to our core business Robust contract base with BHP- Mitsubishi Alliance (BMA) Blackwater- Goonyella coking coal mines & 2 mine- mouth powerplant for Queensland government Highly experienced management team exploring substantial growth pipelines Strong and stable cashflows will drive diversification ☐ ☐ DIVERSIFY: GEOGRAPHY The BUMA Australia acquisition is a first step in expanding our core business into key global mining markets DOID is seeking to leverage our long-standing relationships to build a broad global client base ☐ ADVANTAGE: TECHNOLOGY Monetising BUMA's industry-leading capabilities in Predictive and Digital Maintenance, Mine Plan Optimization and Safety Analytics - Build an Operation Excellence Technology Division to spin-off developed technology The application of this technology to acquisitions (including BUMA Australia) add substantial value ADVANTAGE: INFRASTRUCTURE AND RENEWABLES Leveraging our infrastructure capability to capture Indonesia's renewable business growth and opportunities Initial investments in SUN SG, which is expanding its renewable business throughout South-East Asia and Australia SYNERGIES " Fleet Management Systems Operational Excellence and Safety Systems 123 1. DOID Consolidated financials (BUMA is currently the only operating subsidiary) 2. 3. BUMA's Financial Year is from Jan - Dec. BUMA Australia's Financial Year is from Jul - Jun. Converted at AUDUS$ of 0.75 for FY18, 0.67 for FY19, 0.72 for FY20 and 0.77 for FY21 Calculated as EBITDA divided by revenue ex. Fuel - STRICTLY CONFIDENTIAL - 8

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