Senior Sales Manager - Sustainable & Energy Technologies

Responsibility:
The Senior Sales Manager – Sustainable & Energy Technologies is responsible for developing and managing strategic relationships with major biomethane customers across Thailand. These customers span a wide range of biogas-generating sectors, including livestock farms (pork, chicken, dairy), food waste processing, fruit processing, breweries, Palm oil and bio-ethanol production. The role is focused on driving sales growth, strengthening customer satisfaction, and coordinating cross-functional teams to deliver both commercial and technical solutions tailored to each customer’s needs.
Focus Area:
Waste-to-Energy – Biomethane value chain, including the upgrading of biogas into pipelinequality or fuel-grade biomethane.

Job Duties
Key Account Management

• Build and maintain strong relationships with senior decision-makers at major customer accounts.
• Manage and grow assigned key accounts within the biomethane process industry sectors.
• Develop and execute account strategies to maximize revenue, customer retention, and long-term partnerships.
• Serve as the primary commercial contact for customers, leading negotiations, contract discussions, and pricing topics.
• Coordinate internally with technical, supply chain, and operations teams to ensure smooth project execution and customer satisfaction.
• Monitor customer needs, market developments, local regulatory requirements, and competitor activities to identify growth opportunities

Direct Sales & Opportunity Development

• Present, promote, and sell Sustainable & Energy Technologies to existing and prospective customers.
• Identify and prioritize high-potential customers and segments.
• Deliver compelling value propositions, presentations, and proof of concepts tailored to customer challenges.
• Work with customers to analyze project economics, conduct feasibility studies, and build robust business cases that highlight cost savings, efficiency gains, and sustainability benefits.
• Prepare and submit quotations in line with company policies and approval workflows.
• Negotiate commercial terms and tender conditions while safeguarding company interests.

Sales Planning & Reporting

• Maintain accurate opportunity data, account information, and sales activity records in the CRM system.
• Prepare sales forecasts, performance reviews, and required reports for management. Conduct structured sales planning to ensure strong pipeline health and consistent target achievement

Requirements

• Degree in Chemical, Process Engineering, Business, Economics
• 10+ years of sales or key account management experience in the biomethane industry with existing business network
• Strong commercial, negotiation, and relationship-management skills
• Solid understanding of biomethane industry and value chain
• Excellent interpersonal and communication skills
• Experience in an international business environment
• Goal-oriented, dynamic and high sense of responsibility
• Team and disciplined working spirits
• Good computer skills and proficiency in MS Office Applications
• Excellent written and verbal English skills
• Readiness to travel frequently locally and overseas

With over 90 years' combined experience, NES Fircroft (NES) is proud to be the world's leading engineering staffing provider spanning the Oil & Gas, Power & Renewables, Chemicals, Construction & Infrastructure, Life Sciences, Mining and Manufacturing sectors worldwide. With more than 80 offices in 45 countries, we are able to provide our clients with the engineering and technical expertise they need, wherever and whenever it is needed. We offer contractors far more than a traditional recruitment service, supporting with everything from securing visas and work permits, to providing market-leading benefits packages and accommodation, ensuring they are safely and compliantly able to support our clients.