Rules Change Panel
All proposed modifications to the Market Rules are reviewed by the Rules Change Panel (RCP). Thereafter, the RCP makes a recommendation to the EMC Board and the decision of the EMC Board is submitted to Energy Market Authority for endorsement.

Members of the RCP represent a wide range of experience from the electricity industry and the financial industry.

The current 3-year RCP term is effective from 1 January 2024 to 31 December 2026. 

To view the current Rules Change Work Plan, please click here

The RCP consists of 15 members as follows: 
Toh Seong Wah
Toh Seong Wah is the Chief Executive Officer of EMC. He joined EMC in August 2011 as the head of the Market Operations and Information Technology (MOIT) teams, which provide the resources and support to ensure that the trading, pricing and settlement in the NEMS are in accordance with the Market Rules. Seong Wah brings with him extensive experience from the public sector. Prior to joining EMC, he was involved in several large scale whole-of-government infrastructure and technology initiatives, including the Standard ICT Operating Environment (SOE) which was the largest government infocomm programme at the time with a project value of S$1.3 billion. Seong Wah graduated from Nanyang Technological University with an honours degree in Electrical Engineering.

Employee of EMC
Henry Gan
Henry Gan is currently EMC’s Senior Vice President, Market Operations. He oversees the market operations of the NEMS and ensures that market operations are consistent with the strategic direction of the organisation. He leads a team of customer driven staff to plan and implement solutions that support an efficient and reliable market. This includes pricing and information operations, settlement and clearing operations as well as the management of ancillary services contracts. Henry has significant industry and technical experience and has been with EMC since the start of the market. Prior to joining EMC in early 2001, he was Market Operations Manager for the Singapore Electricity Pool with PowerGrid which he joined in 1996. Henry graduated in 1996 from Nanyang Technological University with an Honours degree in Electrical Engineering.

Representative of the PSO
Soh Yap Choon
Soh Yap Choon is the Deputy Chief Executive (System Operation) of the Power System Operation Division (PSOD) of EMA. He heads the Power System Operator which arranges for the secure operation of the power system in Singapore and ensures the security of supply of electricity to consumers. PSOD's Power System Control Centre (PSCC) is the nerve centre of the electricity generation and transmission system. The Division operates mission critical Energy Management Systems, and carries out power system studies and assessments of the impact of new generating plants as well as transmission expansion plans of electricity and gas transmission licensees. Yap Choon holds a Bachelor Degree (Hons) in Electrical & Electronic Engineering from Nanyang Technological University.

Representative of the Generation Licensee class of market participant

Teo Chin Hau
Teo Chin Hau is General Manager, Portfolio Management at PacificLight Power Pte Ltd. He currently oversees operation of both the electricity and gas markets and management of strategic fuel, in addition to fuel and foreign exchange hedging. He has over 10 years of experience in the Singapore energy industry, having previously been involved in wholesale trading, retail pricing, gas and electricity regulatory tariff setting, regulatory management and portfolio hedging. Chin Hau holds a  B.Eng (Hons) in Mechanical Engineering from the National University of Singapore. 

Calvin Quek
Calvin Quek is the Vice President, Prompt Trading of Senoko Energy Pte Ltd with 9 years of experience in the industry. He is responsible for managing the trading team's market optimization strategies, the day to day trading operations as well as evaluation of consultation papers and market rules changes. He holds a Bachelor degree in Electrical & Electronic Engineering from Nanyang Technological University, Singapore.

Koay Yi Jing
Koay Yi Jing is a professional in the energy sector with more than 10 years of experience in both the commercial and technical fronts. She currently heads the Power & Portfolio Strategy Department and oversees the end-to-end commercial process for Sembcorp Cogen Pte Ltd, which includes wholesale trading bidding in the SWEM for BESS and CCGTs, power contracting, power pricing, and commodity hedging. She contributed to the commissioning of generators such as Sembcorp Cogen’s CCP3 and JI BESS. She has an interest in developing business cases for BESS and VPPs in Singapore. Yi Jing holds a Bachelor of Engineering in Mechanical Engineering (Honours) from the National University of Singapore. 

Representative of the Transmission Licensee class of market participant
Sherman Toh
Sherman Toh is an Assistant Director (Regulatory Management) of Singapore Power (SP) Ltd. He has more than 20 years of experience in the power industry and is responsible for commercial and policy affairs in SP’s regulated Transmission & Distribution business in Singapore. He holds a B.Eng (Hons) in Electronic & Electrical Engineering from University of Glasgow.

Representatives of the Retail Electricity Licensee class of market participant

Matthijs Jan Guichelaar
Matthijs Jan Guichelaar is the CEO of Flo Energy Singapore Pte Ltd. He has over 10 years of experience in the energy sector. He has experienced various electricity market transformations in his previous capacity as the CEO of Dutch licensed energy retailer Vandebron B.V. Matthijs previously served as the treasurer of the Free Trade Organisation of Electricity and Gas (VOEG), a trade association for energy retailers in the Netherlands. He holds a Bachelor of Civil Engineering from the University of Applied Sciences, Amsterdam.

Dallon Kay  
Dallon Kay is the founder and owner of Diamond Electric a licensed Independent Electricity Retailer in the National Electricity Market of Singapore. The company is the pioneering Demand Response Aggregator in Singapore, joining the market in 2006. His previous roles in the region include Director, Commercial Development Asia for Duke Energy, and Director, Power Markets and Regulatory Strategy Asia for Chevron. He was previously elected to the council of the Sustainable Energy Association of Singapore from 2014 to 2020 and served as Technical Advisor to the National Research Foundation's Central Gap Fund from 2018 to 2022.  Dallon holds a Bachelor of Commerce Degree from the University of Victoria in Canada.     

Andrew Tan 
Andrew Tan serves as the Head of Enterprise Sales & Renewables at Seraya Energy. In this capacity, he is responsible for developing sales and account strategies for the company, with a focus on driving business growth. Prior to joining Seraya Energy, he was a Managing Director at a regional integrated telecom and technology solutions provider, among other roles in the IT sector. Andrew holds a Bachelor of Science in Computer Science with Management from the Singapore Institute of Management.

Representative of the wholesaler electricity market trader class of market participant
Cheong Zhen Siong
Cheong Zhen Siong is currently the Director of Energy Management Office for Air Liquide Singapore Pte Ltd. He has worked in the utilities and energy sector for 16 years and is well-versed in both operational, technical and commercial perspectives of the utility business. He holds a Master In Business Administration and bachelor degree in Chemical Engineering, both from National University of Singapore.

Representative of the Market Support Services Licensee
Kevin Fong Chee Wai
Kevin Fong Chee Wai is currently the Deputy Director in the Regulatory Management department at Singapore Power (SP) Ltd. He is responsible for managing regulatory affairs for SP Services. Prior to joining SP, Kevin held roles in Market Operations in the Energy Market Company and had previous experience in wholesale trading, gas and electricity market operations, and portfolio hedging. He graduated with a Bachelor’s Degree in Electrical & Electronic Engineering from the Nanyang Technological University of Singapore and won the IEEE Power Engineering Chapter (Singapore) Gold Medal in the final year.
Representatives of consumers of electricity in Singapore

Dr Toh Mun Heng
Dr Toh Mun Heng has been a member of the Central Committee of the Consumers Association of Singapore since 1995. He served in the CaseTrust Advisory Council and Fair Trading Legislation Committee, which eventually led to the passing of the Consumer Protection (Fair Trading) Act in 2004. Currently, Dr Toh serves as the Chairperson of CASE Endowment Fund Board of Trustee and Treasurer of CASE. He is consulted by numerous governmental and international organisations which include Agency for Science and Technology Research, ASEAN Secretariat, Civil Aviation Authority of Singapore, InfoComm Development Authority, Singapore, Ministry of Finance, Ministry of Health, Ministry of Manpower, Ministry of Trade and Industry, UN ESCAP and the United Nations and many others. He obtained his doctoral degree in Economics and Econometrics from the University of London, London School of Economics. He is currently an Honorary Fellow of the National University of Singapore and former Associate Professor of the Department of Strategy and Policy, NUS Business School. He researches and writes prolifically in many topics including Household Economics, Manpower/Education Planning and Population Studies and Productivity Measurement and Analysis in Asia Pacific Economies.

Fong Yeng Keong
YK Fong is the Purchasing Manager at Petrochemical Corporation of Singapore (Pte) Ltd (PCS). He has over 20 years of experience in PCS and is currently responsible for procurement of all plant, equipment, spares, major utilities and services from external sources to facilitate smooth and efficient operation and maintenance work. His major duties include contracts’ price, negotiation of terms and conditions, contractor evaluations and overseeing the operation of PCS’s warehouses. He holds an MSc Mechanical Engineering from National University of Singapore.

Person experienced in financial matters in Singapore

Wong Yew Chung
Wong Yew Chung is a Chartered Accountant of Singapore, ISCA, and is a member of the ISCA Financial Reporting Committee. He is currently a Partner at Ernst & Young LLP. He has more than 20 years of experience in providing audit and business advisory services to various power & utilities companies, including gas importers, generation companies, grid operator, retailers and renewable companies locally and abroad. He also conducts seminars and presentations for clients and conferences, on various topics including Accounting for Carbon Credits and Virtual Power Purchase Agreements. Yew Chung holds a Bachelor of Accountancy (Honours) from Nanyang Technological University.