DEISO works with enterprises, suppliers, and public sustainability organizations across LCA, GHG accounting, PCF, EPD, S-LCA, critical review, and ESG evidence. The work is technical, defensible, and built to be verified — and so is how we hire.
DEISO is a small, focused team in Tokyo working with clients in 29+ countries. The work suits people who like deep, methodical problems — clean system boundaries, traceable data, ISO-aligned methodology, defensible documentation — and who want their output to land on the desk of a decision-maker, not in a slide deck.
If you are a sustainability practitioner, technical specialist, or consultant, there are two ways to work with DEISO: full-time and project-based roles, and the DEISO Global Expert Network for independent consultants who collaborate with DEISO on specialized engagements.
DEISO Tokyo · Technical Execution and Independent Review
Execution-focused role supporting technical review, verification readiness, and pre-submission strengthening of sustainability outputs under real project conditions — LCA, GHG accounting, PCF, EPD, and S-LCA work for enterprise and public-sector clients.
DEISO Tokyo · Sustainability OS Engineering
Execution-focused role designing structured sustainability systems, digital workspace environments, and decision-ready delivery architecture under real project conditions — turning client data, indicators, and documentation into repeatable, verification-ready workflows.
Earlier DEISO openings, kept on file for reference. These roles are no longer accepting applications, but the titles show the kind of work DEISO hires for across technical execution, structured sustainability delivery, digital workspace systems, and expert-led professional roles.
Job ID: JOBDS0529202589
Number of Vacancies: 2 employees
Workplace: Tokyo.
Contract: Full time
Employment Probation Period: 1 month.
Application Deadline: Until the position is filled.
Are you an experienced Digital Twin Engineer with AI skills and a passion for no-code development? DEISO LLC is looking for a forward-thinking engineer to join our Tokyo office and contribute to innovative projects across AI, cloud engineering, and smart infrastructure.
Job ID: DSJOB-05282902523
Number of Vacancies: 2 employees
Workplace: Tokyo.
Contract: Full time
Employment Probation Period: 1 month.
Application Deadline: Until the position is filled.
DEISO LLC is a Japanese sustainability and technology company at the forefront of AI innovation for environmental and life cycle intelligence. We develop AI-driven platforms such as EcoIN Data AI, CFs Finder AI, Sansu AI, and Kensa AI, which automate and optimize Life Cycle Assessment (LCA), EPD verification, PCF, GHG accounting, and environmental decision-making.
We are seeking a highly skilled and mission-driven AI Engineer to join our expert team and contribute to the development of advanced AI applications for sustainability.
Number of Vacancies: 2 employees
Workplace: Tokyo.
Contract: Full time
Employment Probation Period: 1 month.
Application Deadline: Until the position is filled.
Number of Vacancies: 1 employ.
Workplace: Tokyo.
Contract: Full time
Employment Probation Period: 1 month.
Application Deadline: Until the position is filled.
Number of Vacancies: 1 employ.
Workplace: Hybrid, Remote, Saitama City.
Contract: Part-time.
Employment Probation Period: 1 month.
Application Deadline: Until the position is filled.
Number of Vacancies: 1 employ.
Workplace: Hybrid, Saitama City.
Contract: Part-time.
Employment Probation Period: 1 month.
Application Deadline: Until the position is filled.
We urgently seek a Senior Administrative and Technical Assistant. They can respond to clients’ inquiries from companies in Japan (in Japanese) and international companies (in English) and perform office management daily tasks. Japanese language ability is a must. We welcome candidates with positive, friendly, modest, and positive attitudes who can work in an international business environment.
Number of Vacancies: 1 employ.
Workplace: Remote
Contract: Part-time.
Employment Probation Period: 1 month.
Application Deadline: Until the position is filled.
We are looking for a technical assistant who can respond to client inquiries of Japanese companies. As a member of the DEISO R&D team, this job requires the applicant to grasp the technical aspects of the services we provide and work with experts within an English communication work environment. The applicant will respond to inquiries by Japanese companies, both technically and administratively. Responding to our clients’ inquiries and requests by email, remote meetings, and in-person communication (when needed). You will have to prepare, fill out, and submit documents and applications.
Number of Vacancies: 1 employ.
Work Place: Remote/Hybrid
Contract: Full time.
Employment Probation Period: 3 months.
Application Deadline: Until the position is filled.
DEISO is hiring a Database Engineer to join our team for software development. The database engineer will extensively involve a team of researchers, programmers, and designers to develop environmental desktop software and cloud-based applications that serve a wide range of industries as a product. The database engineer is expected to contribute to the product’s development fully.
Number of Vacancies: 1 employ.
Work Place: Sendai, Japan.
Contract: Full time.
Employment Probation Period: 3 months.
Application Deadline: Until the position is filled.
DEISO is hiring a Software Engineer to join our team for software development. The successful candidate will develop environmental sustainability software in collaboration with a Database Engineer and Senior Researchers.
Number of Vacancies: 1 employ.
Work Place: Sendai, Japan.
Contract: Part-time.
Employment Probation Period: 3 months.
Application Deadline: Until the position is filled.
A position an Administrative Assistant position is open at DEISO to support the administration work and management of the company. This position requires full Japanese proficiency and a business level of English communication, demonstrating a professional office administration and management.
English Address:
Level 21 Shiodome Shibarikyu Building
1-2-3 Kaigan, Minato-ku
105-0022 Tokyo, Japan.
Japanese Address:
〒105-0022 東京都港区海岸1-2-3
汐留芝離宮ビルディング21階, 合同会社DEISO.
Phone (JP): 03-5403-6479 / 0488-72-6373
Phone (EN): 070-6969-7700
Fax: 03-5403-6475 / 0488-72-6373
Email: info@dei.so
Move your sustainability work from planning to execution — with DEISO support for LCA, GHG accounting, PCF, EPD, ESG evidence, carbon management, technical review, compliance reporting, sustainability system setup, implementation support, and execution-based capacity building.
