Careers

Please feel free to drop us a line at jobs@dei.so with a cover letter telling us a bit about yourself, your work experience, and the type of job you’re interested in. We’ll get in touch should we have any openings that suit you, or even if there’s anything else we can do for you!

Join the DEISO Global Expert Network and explore collaboration opportunities with DEISO across specialized sustainability and technical execution domains.

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Senior Sustainability Technical Auditor & Compliance Readiness Specialist Job Opening in Tokyo – Apply Now | DEISO Careers

Execution-focused role supporting technical audit, compliance readiness, and pre-submission strengthening of sustainability outputs under real project conditions.

Apply Now

Job ID: DSJ04162649

Number of Vacancies: 1 employee

Contract: Full time

Employment Probation Period: 3 months

Application Deadline: June 20, 2026

Senior Sustainability Systems & Digital Intelligence Architect Job Opening in Tokyo – Apply Now | DEISO Careers

Execution-focused role supporting structured sustainability systems, digital intelligence environments, and decision-ready delivery architecture under real project conditions.

Apply Now

Job ID: DSJ04162624

Number of Vacancies: 1 employee

Contract: Full time

Employment Probation Period: 3 months

Application Deadline: June 20, 2026

Previous Open Positions

Archived Job Titles at DEISO

Explore previously published DEISO job openings and archived position titles. This section helps readers review earlier opportunities across technical execution, structured sustainability delivery, digital intelligence, and expert-led professional roles.

View Archived Jobs

Digital Twin Engineer Job Opening in Tokyo – Apply Now | DEISO Careers

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.

Closed

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.

Join DEISO as an AI Engineer (Full-Time | Tokyo or Remote)

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.

Closed

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.

Open Positions: Lead GHG Verifiers (Job ID: DSJOB250120)

Number of Vacancies: 2 employees

Workplace: Tokyo.

Contract: Full time

Employment Probation Period: 1 month.

Application Deadline: Until the position is filled.

Closed

DEISO LLC is seeking highly qualified and experienced Lead GHG Verifiers to join our expert team. This is an excellent opportunity to work with a leading organization in greenhouse gas (GHG) verification and sustainability.

Life Cycle Assessment (LCA) Specialist (Job ID: DSJOB240907)

Number of Vacancies: 1 employ.

Workplace: Tokyo.

Contract: Full time

Employment Probation Period: 1 month.

Application Deadline: Until the position is filled.

Closed

DEISO LLC is seeking a highly motivated and experienced Life Cycle Assessment (LCA) Specialist to join our growing team. In this role, you will play a key role in supporting our sustainability initiatives by conducting LCA studies and promoting the integration of LCA principles throughout our projects.

Personal Assistant to CEO

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.

Closed

Hiring a Personal Assistant: DEISO is urgently seeking and employing a personal assistant for DEISO CEO (dei.so):

(1) Native Japanese speaker, (2) business-level English speaker, and (3) resides in Saitama, Japan.

Please contact us (https://dei.so/contact) if you are interested or know someone who is.

Senior Administrative and Technical Assistant

Number of Vacancies: 1 employ.

Workplace: Hybrid, Saitama City.

Contract: Part-time.

Employment Probation Period: 1 month.

Application Deadline: Until the position is filled.

Closed

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.

Technical Assistant

Number of Vacancies: 1 employ.

Workplace: Remote

Contract: Part-time.

Employment Probation Period: 1 month.

Application Deadline: Until the position is filled.

Closed

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.

Database Engineer

Number of Vacancies: 1 employ.

Work Place: Remote/Hybrid

Contract: Full time.

Employment Probation Period: 3 months.

Application Deadline: Until the position is filled.

Closed

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.

Software Engineer

Number of Vacancies: 1 employ.

Work Place: Sendai, Japan.

Contract: Full time.

Employment Probation Period: 3 months.

Application Deadline: Until the position is filled.

Closed

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.

Administrative Assistant

Number of Vacancies: 1 employ.

Work Place: Sendai, Japan.

Contract: Part-time.

Employment Probation Period: 3 months.

Application Deadline: Until the position is filled.

Closed

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.