Our Team

ESC's success is based on the dedicated professionals that make up our firm. Our staff include professionals in Architect-Engineering Design, Geotechnical Engineering, Environmental Science & Engineering, Construction Management, and related fields. The majority of our technical staff are multilingual, hold postgraduate level degrees, and have extensive experience in our industry. Please follow the link for a summary of our staff’s qualifications.


Eric Newman, PE


US registered engineer with over 25 years' business and consulting experience in Japan.

Ryan Nelson, PE, LEED AP BD+C


US registered Civil and Mechanical Engineer with over 20 years' experience in Asia, the Middle East, and the United States.


Sadaharu Uezato

Civil Engineering

Japan registered 1st Class Civil Engineer and Land Surveyor with over 30 years' experience delivering projects for Japanese and US clients.

Jimmy Oshiro, GE, PE

Geotechnical Engineering

US registered Geotechnical and Civil Engineer with over 10 years' geotechnical engineering experience in Japan. Fluent in English, Japanese, Spanish and Portuguese.

Naho Ishiki, MS

Environmental Services

Senior Environmental Scientist with over 10 years' professional experience in Japan, South East Asia, and the United States. Fluent in Japanese and English.

Marian Tapia


Professional Architect with over 15 years’ experience in project management and design of clinics, shopping centers, restaurants, and office buildings. Fluent in Spanish and English.

Alex Berry, PE

Comercial Services

US registered engineer with over 10 years' environmental and civil engineering consulting experience in Japan. Fluent in English and Japanese.

Joji Watanabe, MBA

Overseas Development Assistance

Senior Consultant with over 40 years' experience in Overseas Development Assistance projects principally in Asia and Africa. Fluent in Japanese and English.

Byamba Bolorchimeg, PhD

Overseas Development Assistance

PhD in Environmental Science with an undergraduate education in International Economic Relations. Fluent in English, Russian, Mongolian and Japanese.

Vladimir Gomez, PhD

GIS/Remote Sensing Mapping

PhD in Civil and Environmental Engineering with over 15 years' experience in remote sensing, mapping, and numerical modeling. Fluent in English, Spanish, Portuguese and German.

Jorge Nakao, MEM

Topographic Survey

Civil Engineer with over 10 years' experience in Topographic Survey, UAV Mapping Systems, and Construction Management. Fluent in English, Spanish, and Japanese.

Mariko Shimabukuro

Office Manager

Over 15 years' administrative and office management experience in Canada, the United States, and Japan. Fluent in Japanese and English.