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16 August 2026
Job ID: PL-356
เจ้าหน้าที่การตลาด / พัฒนาธุรกิจ (Sales & Business Development) สายสิ่งแวดล้อม
Salary negotiable

About the role

An environmental engineering consulting firm is seeking a Sales & Business Development Officer to manage the sale of two main service lines: RE-Veal (a real-time environmental quality and air pollution monitoring system with reports for government submission) and RE-Solve (environmental problem-solving and engineering services including wastewater treatment systems, air pollution control systems, and soil-groundwater work) to industrial factories, livestock farms, industrial estates, and government agencies.

Key responsibilities

  • Identify and acquire new customers across both RE-Veal (environmental monitoring/air pollution) and RE-Solve (wastewater treatment/soil-groundwater/environmental engineering) service lines and build a continuous pipeline

  • Present services to industrial factories, farms, industrial estates, and government agencies (subdistrict and municipal authorities)

  • Maintain and nurture relationships with existing customers (CRM) for ongoing sales and monthly retainer work (Subscription/Retainer)

  • Prepare, track, and close quotations and sales documents in collaboration with the engineering team

  • Coordinate through LINE OA and online channels to receive leads and follow up with customers

  • Track and close sales, and provide status reports to management

  • Visit customers in the lower northern region and nearby provinces as assigned

About you

  • Education: Vocational Certificate (Vocational Level 3-4) to Bachelor's degree in Marketing, Sales, Business Administration, Environmental Science/Engineering, or related field

  • Strong communication, negotiation, and presentation skills

  • Valid driver's license and ability to travel to meet customers in different provinces

  • Basic computer skills (Excel, Word, Email, LINE)

  • Good attitude, diligent, enthusiastic, and passionate about sales and customer engagement

  • Experience in consulting, engineering, industrial, or environmental sales will be given special consideration

Benefits

  • Salary 15,000–20,000 baht (based on experience and ability)

  • Commission from closed deals and performance bonus (higher commission for strong performance)

  • Travel allowance and fuel costs for customer visits

  • Accident insurance

  • Social security

  • Training and development opportunities in business development career path

About us

Ratthana Engineering Co., Ltd. is an environmental engineering consulting firm providing real-time environmental monitoring and environmental engineering solutions to industrial and government clients.

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Job Details:
  • Job Functions:
  • Location:
    Phitsanulok, Thailand
  • Salary:
    Salary negotiable

บริษัท วิศวกรรมรัตนา จำกัด (Ratthana Engineering Co., Ltd.)
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