Consulting Group Co., Ltd. 
is a Thailand-based professional services firm offering engineering, planning and consulting for electric power and renewable energy projects in Southeast Asia.
With particular expertise in the areas of transmission system planning and design, power generation from conventional and alternative energy sources and the environmental and community impacts of power generation and transmission, the company provides support to project owners, developers, contractors and operators as well as governments, state enterprises, lenders and insurance providers


Operating out of offices near Bangkok, APT Consulting Group Co., Ltd. is a company registered under the laws of the Kingdom of Thailand. Founded by Mr. John Diecker in 1996, the firm offers electric power related engineering, planning and consulting services to clients throughout Southeast Asia.

Qualifications & Experience

APT, along with its partners and affiliates, possesses considerable experience with nearly all aspects of electric power project development, operation and maintenance in Southeast Asia. Clients include national utilities, state enterprises, independent power producers, governments, EPC contractors, project developers, private investors, financial institutions, NGO's and others.

Contact us today to learn how our professionals can add value to your energy project.


Qualified individuals interested in employment with APT on either a permanent or contract basis are encouraged to send a resume via e-mail for consideration and inclusion in our database of potential consultants. We prefer that resumes be submitted in Microsoft Word format.

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Interview with John Diecker during Asian Utility Week

Downloads (pdf)

Information regarding APT's capabilities and experience may be downloaded via the following links:

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