About the Management
Our Leadership
ESC’s organisational structure is built upon our strong culture of integrated teamwork and collaboration, and this is reflected in our “1-Enterprise” approach in leading and managing our business.
Our Executive Leadership is responsible for setting and implementing the overall strategy of the enterprise and works jointly with our Senior Management Team to deliver our clients’ projects seamlessly across our practice areas and our geographies.
Leadership Team Members
Executive Leadership
Andrew Young
About Andrew:
Founder and Group CEO of ESC, Andrew has worked within the Asian environmental industry since 1994.
He has gained extensive experience as an environmental specialist within the industry, government and consulting organisations. Andrew’s broad expertise covers solid waste management, planning and impact assessments, air quality management, due diligence and compliance assessments, where Andrew has advised on EHS risks for the acquisition and divestiture of global businesses.
With experience from project inception, development and planning through operations, Andrew brings a wealth of knowledge and practical insights to all his consulting projects.
Geographically, Andrew has advised on EHS risks, liabilities and compliance for government and private sector clients in Singapore, Malaysia, Thailand, Indonesia, Vietnam, Philippines, Taiwan, India, China, Australia, New Zealand, UK and Germany.
Frank Ganendran
About Frank:
Frank has 36 years of experience working in Australia and the Asia-Pacific Region within the environmental and engineering consulting and professional services industry. He has been in senior executive leadership roles for the past 23 years mainly for large international firms.
In 2007, he established and grew a successful Australian-based environmental consulting and advisory practice (E3 Consulting Australia) which was eventually acquired by CDM Smith Inc. in 2011.
His recent role was as the Group Manager and Managing Director of CDM Smith Inc.’s Asia-Pacific region, in charge of approximately 960 staff looking after design, construction, engineering and environmental projects across private and public sector markets as well as for the multilateral lending agencies. He has a proven record of strong leadership, strategy development and implementation, training and developing executive managers, and delivering results. His valuable understanding of the intricacies of combined Asian and Western modalities of business allows him to lead, communicate and be trusted across cultural boundaries effectively and successfully.
Frank has assisted and mentored CEOs, boards and senior executives in strategic development, effective change and leadership, delivering strategic goals and business development.
Nigel Landon
About Nigel:
Nigel has twenty years of experience in International Development projects as a strategic manager and technical specialist. He is also the Technical Principal for Waste Management services, having worked in the water agriculture and environmental sector since 1995 first as an irrigation engineer and later as a solid waste management specialist. Nigel has extensive experience working on environmental projects both in Indonesia and internationally. Having served in both the private sector, for large international agriculture, environment and development consultants, and for the Donor sector with the World Bank, KfW, ADB and UNDP, Nigel has experience managing projects from both consultant and the client’s side. This gives a unique advantage to ensure the Client is fully understood and the needs of the project are appropriately addressed. He has technical expertise focused on water resources planning and management, Irrigation engineering, agricultural planning and development, solid waste management, Renewable Energy, Climate Change, environmental and social impact assessments, EHS, rural development, institutional capacity building, livelihoods development, post-disaster early recovery planning and management.
Nigel has managed, and was Team Leader on, a number of large projects in developing countries, situated in post-disaster and post-conflict environments, including TRWMP, ETESP and NSIASP in Aceh, Indonesia, and the ELWDP Command Area Development Project in Eritrea. He has proven himself to be adept in managing multidisciplinary teams, including international consultants, community facilitators, engineers, administrative staff and other support staff, in difficult environments. Through extensive experience in managing projects with complex and widely diverse development activities, Nigel has considerable knowledge of project planning, financial management, procurement, monitoring and evaluation. Geographically, Nigel has worked on a diverse range of projects in the Middle East, Africa, Eastern Europe, and Asia including Pakistan, Libya, Kosovo, Albania, Eritrea, and for more than 12 years in Indonesia.
Country Managers
David Cham
About David:
David Cham has over 17 years of experience in environmental, health and safety (EHS) consulting. David has a strong track record in EHS assessments including soil, groundwater, water, wastewater, air quality, industrial hygiene, noise, vibration and air quality; EHS compliance; due diligence assessment and sustainability reporting. In his current role, David is responsible for the day-to-day management of ESC’s Singapore business and spearhead the development and growth of the office.
Prior to joining ESC, David has held several senior leadership position including Environmental and Operations manager at an environmental testing laboratory, EHS Manager for Asia Pacific (including Australia, India and Japan) for a datacenter company, EHS Manager for South East Asia for a networking company. He was involved in numerous projects including site investigation and baseline studies; environmental impact assessments; risk assessments; decommissioning, demolition and remediation; across the various disciplines with overall responsibility for the technical and commercial aspects of the projects. He has managed and worked on projects in Singapore and Asia Pacific region including China, Hong Kong, Indonesia, India, Japan, Korea, Malaysia, the Philippines, Sri Lanka, Taiwan, Thailand, Vietnam and Australia.
Tessa Morton
About Tessa:
Tessa is an international environmental & social specialist and urban planner with over 20 years’ experience advising on projects while living in Indonesia, Myanmar and UK. She has master’s degrees in Town Planning and Real Estate Management, and is a Chartered Member of the UK Royal Town Planning Institute.
Tessa’s E&S work in Indonesia and Myanmar has included technical advisory on many large scale infrastructure projects including ESIAs, and the writing of E&S manuals for mainstreaming the management of E&S issues into projects.
Along with E&S specific work, Tessa’s experience also includes major project management roles with private developers and public sector agencies in urban planning and real estate development. She has been working in SE Asia for the last 12 years in Indonesia and Myanmar, on developments which required complex approaches to urban planning for mixed use, industrial and residential-led development, including the integration of E&S and GSI assessment and management. Prior to living in SE Asia, Tessa lived and worked in London UK for Jones Lang LaSalle providing town planning consultancy to a range of private sector clients across the UK.
Khoo Boon Keat
About Boon Keat:
Boon Keat has over 30 years of experience in environmental management in the construction of large infrastructure projects, including soil erosion control, river/water pollution control, noise level control, waste management, social and stakeholder planning and engagements.
He is a certified Sustainable INFRASTAR facilitator and has helped large infrastructure projects earn a 5-star rating. He has worked on Environmental Impact Assessments, Environmental Audits, and Feasibility Studies for projects all over Malaysia, including the railway, major roads and highways, dam, reclamation, coastal rehabilitation, bridge, marine, drainage, water and sewage treatment plant, township, and tunnel. He was involved in important projects like the KVMRT Putrajaya Line, KLIA 2, the Second Penang Bridge, the East Coast Rail Link, Teluk Chempedak, and the Pulau Tioman Beach Rehabilitation.
His training as a Civil Engineer gives him superior insights into construction site management and he can formulate practical, cost-effective solutions to address a wide range of environmental challenges.
Gerald Chan
About Gerald:
Gerald Chan has 15 years of experience in energy management, ESG, and sustainability consulting. As a Certified Energy Manager (CEM), Gerald is an accomplished professional in the field with experience providing energy advice to over 100 clients across different sectors. With his accreditations as Certified Measurement and Verification Professional (CMVP) and Certified Building Commissioning Professional (CBCP), he had successfully delivered energy saving measures with verified savings for clients in all projects.
Gerald is also a seasoned sustainability advisor who led corporate clients in formulating sustainability targets and advancing towards their carbon net zero commitments through strategic planning, data driven analysis and multidisciplinary collaboration with all stakeholders within the organisation. He was regional sustainability lead in Asia-Pacific region for financial institutions and real estate enterprise for more than 8 years, where he integrated sustainability approaches into core business functions and supported the clients in meeting various sustainability performance targets and disclosure requirements.
Dr. Le Song Ha
About Song Ha:
Dr. Le has over 15 years of experience in project management and technical delivery for environmental consulting and infrastructure projects. She has been involved in all stages of infrastructure projects, including master planning, concept and detailed design, tender preparation, and construction supervision. Her expertise covers engineering assessment and design, and guidelines, standards, and regulations review and recommendation. Throughout her career, she has effectively managed and delivered numerous projects across Asia (Singapore, Vietnam, Laos, Cambodia, Thailand, Indonesia, China) for diverse public and private clients and international development aids, with consultancy values of USD2M and construction values up to USD900M.
Technical Principals
Tan Giok Hui
Oka Simanjuntak
About Oka:
Oka Simanjuntak has over 26 years of multidisciplinary experience in infrastructure development, financing, and climate-aligned investment structuring. He integrates economic and technical rigour to mobilise blended finance, applying key international ESG standards, including the IFC Performance Standards and Equator Principles to de-risk complex low-carbon infrastructure. He specialises across renewable energy, circular economy, social infrastructure, transport electrification, and water/wastewater systems. His work has unlocked over US$350 million in CAPEX via PPP models and carbon markets.
He has delivered high-impact assignments for IFC – World Bank Group, ADB, KfW, PT IIF, and PT SMI, alongside private-sector roles in toll roads, chemical manufacturing, and global consultancy with Mott MacDonald and CDM Smith, collaborating with PwC, EY, and KPMG. Across Indonesia, he advanced climate-aligned PPPs like the Merangin Dam, Cisaranten Housing, Solo City Lighting, Bintuni Bay Industrial Estate, and Badung Ring Road, while championing Land Value Capture and leading feasibility studies for tidal energy. He has driven transport electrification, including the Bandung Multimodal Transport Masterplan and supported financial readiness for the Jakarta–Bandung High-Speed Rail with PwC.
Nigel Landon
About Nigel:
Nigel has twenty years of experience in International Development projects as a strategic manager and technical specialist. He is also the Technical Principal for Waste Management services, having worked in the water agriculture and environmental sector since 1995 first as an irrigation engineer and later as a solid waste management specialist. Nigel has extensive experience working on environmental projects both in Indonesia and internationally. Having served in both the private sector, for large international agriculture, environment and development consultants, and for the Donor sector with the World Bank, KfW, ADB and UNDP, Nigel has experience managing projects from both consultant and the client’s side. This gives a unique advantage to ensure the Client is fully understood and the needs of the project are appropriately addressed. He has technical expertise focused on water resources planning and management, Irrigation engineering, agricultural planning and development, solid waste management, Renewable Energy, Climate Change, environmental and social impact assessments, EHS, rural development, institutional capacity building, livelihoods development, post-disaster early recovery planning and management.
Nigel has managed, and was Team Leader on, a number of large projects in developing countries, situated in post-disaster and post-conflict environments, including TRWMP, ETESP and NSIASP in Aceh, Indonesia, and the ELWDP Command Area Development Project in Eritrea. He has proven himself to be adept in managing multidisciplinary teams, including international consultants, community facilitators, engineers, administrative staff and other support staff, in difficult environments. Through extensive experience in managing projects with complex and widely diverse development activities, Nigel has considerable knowledge of project planning, financial management, procurement, monitoring and evaluation. Geographically, Nigel has worked on a diverse range of projects in the Middle East, Africa, Eastern Europe, and Asia including Pakistan, Libya, Kosovo, Albania, Eritrea, and for more than 12 years in Indonesia.
Arjen van Schaijk
About Arjen:
Arjen has 25 years of professional experience working as a consultant in the environmental industry. He has held Senior Management positions with technical, operational, and financial accountability since 2005 and has on-the-ground project management experience in most Asia/Pacific countries, in Africa and Europe.
Arjen’s broad expertise covers site investigation, human health risk assessment and remediation, due diligence and compliance assessments, solid waste management, impact assessments and planning and air quality management. With his brought experience from project inception, development and planning through to operations working across countries and cultures, Arjen brings a wealth of knowledge and practical insights to all his consulting projects.
Over the past 10 years, Arjen has been focused on directing projects and growing and mentoring teams for large-scale upstream and downstream oil & gas (O&G) investigation and remediation programs and chemical and manufacturing sector projects in China, South Africa, and Indonesia. Besides, he has been an account manager responsible for client management, business development and operational management with P&L responsibilities.
Arjen has led several multi–year site investigation and remediation programs and numerous complex scientific, technical, and environmental due diligence programmes, including site characterization, remediation options and costing analysis and remediation action plans.
Geographically Arjen has advised on EHS risks, liabilities, and compliance mainly for multinationals in Singapore, Indonesia, South Africa, China, Taiwan, The Philippines, Malaysia, Thailand, Brunei, Japan and The Netherlands.
David Cham
About David:
David Cham has over 17 years of experience in environmental, health and safety (EHS) consulting. David has a strong track record in EHS assessments including soil, groundwater, water, wastewater, air quality, industrial hygiene, noise, vibration and air quality; EHS compliance; due diligence assessment and sustainability reporting. In his current role, David is responsible for the day-to-day management of ESC’s Singapore business and spearhead the development and growth of the office.
Prior to joining ESC, David has held several senior leadership position including Environmental and Operations manager at an environmental testing laboratory, EHS Manager for Asia Pacific (including Australia, India and Japan) for a datacenter company, EHS Manager for South East Asia for a networking company. He was involved in numerous projects including site investigation and baseline studies; environmental impact assessments; risk assessments; decommissioning, demolition and remediation; across the various disciplines with overall responsibility for the technical and commercial aspects of the projects. He has managed and worked on projects in Singapore and Asia Pacific region including China, Hong Kong, Indonesia, India, Japan, Korea, Malaysia, the Philippines, Sri Lanka, Taiwan, Thailand, Vietnam and Australia.
Antony Wong
About Antony:
Antony is a Certified Noise Modelling Professional, a registered BEAM Professional, an Accredited Monitoring Professional and a Qualified Environmental Professional with 27+ years of consultancy experience. He has trained as an IRCA Certified Quality Management System Auditor, Environmental Management Systems Auditor, and Occupational H&S Management Systems Auditor. Antony is fluent in Cantonese, Mandarin and English.
Antony specialises in air quality and noise modelling, land contamination assessment and remediation, environmental assessment, sewerage and drainage assessments, Environmental Health & Safety (EHS), and Due Diligence/Compliance Auditing – he has managed more than 300 such projects to-date in China, Hong Kong, Macao, Mongolia, Singapore and South Korea.
In 2023, Antony joined ESC as Technical Director for Hong Kong, to develop new business opportunities and strengthen ESC’s presence in Hong Kong, and to lead ESC’s regional air quality and noise centre of excellence.
Dr. Le Song Ha
About Song Ha:
Dr. Le has over 15 years of experience in project management and technical delivery for environmental consulting and infrastructure projects. She has been involved in all stages of infrastructure projects, including master planning, concept and detailed design, tender preparation, and construction supervision. Her expertise covers engineering assessment and design, and guidelines, standards, and regulations review and recommendation. Throughout her career, she has effectively managed and delivered numerous projects across Asia (Singapore, Vietnam, Laos, Cambodia, Thailand, Indonesia, China) for diverse public and private clients and international development aids, with consultancy values of USD2M and construction values up to USD900M.
Pirabagaran Balasingam
About Pira:
Piraba Bala brings over 20 years of expertise in Environmental, Health, and Safety (EHS), with extensive experience across Asia and the Middle East. He specializes in Site Investigation and Remediation and has held senior management roles since 2022, overseeing technical leadership, operational performance, and financial accountability. Known for his practical approach and strategic insight, Piraba combines hands-on project management with a deep understanding of industry best practices.
Throughout his career, he has worked with leading multinational technology firms, manufacturing industries, and major oil and gas companies—including PETRONAS, Shell, ExxonMobil, Caltex, and Total—primarily in downstream operations such as retail stations, depots, refineries, and pipelines. He has also contributed to offshore baseline data collection and impact assessment projects in Malaysian and Bruneian waters.
Prashant Karkare
About Prashant:
Prashant Karkare is an urban planner with over 20 years of diverse experience. He works in the urban space cover project formulations and appraisal, urban governance, institutional development, project development, municipal finance and capital investment planning. Specifically, he has been mainly involved in all aspects of project management covering urban water supply and sanitation investments in Asia region funded by several International Financial Institutions.