Sustainable Development Manager

About the role

This role owns the Group's sustainability strategy execution, climate and carbon management, ESG reporting and disclosure, and the delivery of the sustainability project portfolio. You will act as a sustainability business partner across the organisation, translating climate strategy into action, managing stakeholder engagement with internal functions and external parties, and building sustainability capability across the business.

Key responsibilities

• Own the Group GHG inventory (Scope 1, Scope 2, and material Scope 3 categories) — set the data boundary, run annual collection, and secure third-party verification.
• Translate the Climate Strategy into a costed decarbonisation roadmap with annual reduction targets by business unit.
• Lead abatement initiatives across energy efficiency, renewable energy, circular economy, and behaviour change — build the business case, track abatement delivered, and report cost per tonne.
• Run the annual disclosure cycle end-to-end against IFRS S1/S2, GRI, TCFD, and the FTSE Russell ESG assessment — owning the calendar, data controls, and sign-off path.
• Build and maintain the sustainability data architecture — defined metrics, named data owners in each function, and an audit trail sufficient for external assurance.
• Lead the materiality assessment refresh and translate the results into strategy priorities and disclosure scope.
• Plan and deliver the sustainability project portfolio — scope, budget, timeline, and resourcing — escalating trade-offs early rather than at deadline.
• Track portfolio performance against SD KPIs and report variance, with corrective action, to the Head of Sustainability monthly.
• Act as sustainability business partner to operations, procurement, HR, and finance — securing data, commitment, and delivery from functions outside direct authority.
• Prepare and present sustainability content to the executive committee, investors, rating agencies, customers, and regulators.

About you

• Bachelor's or Master's degree in Environmental Science, Engineering, Sustainability, Business, or a related field.
• Minimum 5 years' experience in corporate sustainability, ESG reporting, or environmental project management.
• Experience in leading double-materiality assessment and structured stakeholder engagement.
• Demonstrated ownership of a corporate GHG inventory (Scope 1, 2, and Scope 3) — including data collection design and external verification.
• Hands-on experience producing a published sustainability report against a recognised framework (GRI, IFRS S1/S2, TCFD, or equivalent).
• Working knowledge of the GHG Protocol and at least one ESG rating or assessment process (FTSE Russell, DJSI/CSA, CDP, or SET ESG Ratings).
• Proven project management capability — control of budget, timeline, and resources on multi-stakeholder initiatives.
• Strong storytelling skills, with the ability to communicate sustainability topics clearly and effectively.
• Professional working proficiency in Thai and English, written and spoken.