The Rules Change Panel has a Technical Working Group (TWG) to assist it in reviewing technical changes to the Market Rules.

The TWG is responsible for examining the on-going evolution of the dispatch and price discovery process, balancing economic, financial and technical considerations in creating more efficient wholesale electricity markets.

The TWG consists of eight members:

• Chairperson nominated by EMC
• Four experts nominated by market participants (excluding the Transmission Licensee)
• One person nominated by the Transmission Licensee
• One person nominated by the Power System Operator (PSO)
• One market clearing engine expert nominated by EMC

Paul Poh
Paul Poh heads the Market Administration team at EMC, which is responsible for advising the Rules Change Panel and the EMC Board on market design issues and for evolving the wholesale electricity market to attain efficiency gains. Paul gained extensive experience in the areas of development and operation during his years with the Singapore Commodity Exchange and the Singapore International Monetary Exchange Ltd (now Singapore Exchange – Derivative Trading). He has a comprehensive knowledge of audit and compliance, risk management, trading systems, clearing house operations, new product development, rules and policy formulation. Paul was a key member of the pioneer team that set up Singapore Commodity Exchange Ltd. He was also involved in the establishment of a futures brokerage operation for a clearing member of the Singapore International Monetary Exchange Ltd. Paul graduated from the National University of Singapore with a degree in Business Administration.

Chua Gwen Heng
Gwen Heng is the Assistant Vice President of Sembcorp Cogen Pte Ltd. He is in charge of the Electricity Pool Trading Division of SembCogen Plant in Singapore and is responsible for the daily energy trading activities. He has more than 30 years of experience in the power generation industry and has spent most of his professional career in fuel management for power plants. He was solely in charge of setting up the entire trading system for a power plant when the Singapore electricity market went through a deregulation phase and formed the Singapore Electricity Pool (SEP) Market in 1998. He had also played a vital role in transforming the company’s trading and settlement system for the New Electricity Market of Singapore (NEMS) when the Government decided to further deregulate the market. Besides having immense experience in pool trading, Gwen Heng has also gained extensive understanding of the market rules and the mechanisms of the retail market through his dedicated years of service in the industry.

Tung Ho Kok
Mr Tung is the General Manager (Portfolio Management) in GMR Energy (Singapore) Pte Ltd. His current role involves managing the electricity trading department and developing strategies to promote electricity products and services to contestable consumers. Mr Tung has 30 years of extensive experience in power industry, including construction and operation of generation plants, electricity trading and electricity retailing. He holds a Bachelor of Engineering (Mechanical) from the National University of Singapore and a Master Degree in System Engineering (Control) from Case Western Reserve University, Ohio, USA.  Mr Tung is also a member of Professional Engineers Board, Singapore.

Lin Nan
Ms Lin is Portfolio Manager of Seraya Energy Pte Ltd. She has six years of experience in electricity market in the fields of operation, analysis and research in both wholesale and retail electricity markets. Her current responsibility is to lead a pricing team to implement pricing and hedging strategies, and to form effective group portfolio strategies.  Ms Lin Nan holds a Bachelor of Engineering (First Class honour) from National University of Singapore.

Tini Mulyawati
Tini Mulyawati is the Head of Trading at Keppel Energy Pte Ltd.  Her role involves managing a team responsible for energy wholesale market trading.  She played a vital role in commencement of the company’s energy trading and fuel hedging where a new IT system and wholesale trading policy were first developed for Keppel Merlimau Cogen’s entry into the NEMS.  She holds a Bachelor of Science Degree in Business Administration and a Bachelor of Computer in Information System.

Lionel Lee Soo Hian
Lionel is the Deputy Director of the Transmission Planning Section in SP PowerGrid Ltd, a member of the Singapore Power Group. Lionel has more than 14 years of work experience in the planning and design of transmission network, including the design for connection schemes for generation companies and electricity supply schemes for major customers. Currently, he is responsible for the overall planning and design of the Singapore transmission network development from 66kV up to 400kV, to ensure that the power system continues to be secure, reliable and cost effective in meeting the economic growth. Lionel graduated from Nanyang Technological University of Singapore with a Bachelor of Electrical Engineering.

Yong Thi Yen
Mr Yong Thi Yen is a Specialist in the System Control Department of the Power System Operation Division of the Energy Market Authority. His Department is responsible for real-time operation of the power system in Singapore. His job responsibilities includes generators and transmission equipment outage co-ordinations, daily to monthly adequacy and security assessment of the power system and review of various rules changes, especially those related to operation of the power system. He has about 30 years of experience in the electricity industry and which includes many years in the private sector companies. Mr Yong has a Bachelor of Engineering (1982), and a Master of Science (1987), in Electrical Engineering and Industrial Engineering respectively, from the National University of Singapore. He is a Registered Professional Engineer (Electrical).

Bai Jie
Bai Jie is Senior Market Analyst at EMC. Her primary responsibilities include price discovery, market modeling and market information dissemination. She is actively involved in enhancing the market system and improving market operation efficiency by identifying gaps between business processes and the market system, suggesting improvements to enhance the efficiency and modelling accuracy of the Market Clearing Engine, spearheading in-depth studies and pricing analysis under varying market and power system scenarios. Bai Jie holds a  PH.D. degree in Electrical & Electronic Engineering from Nanyang Technological University, Singapore.