Loi has extensive professional experience of standards and auditing programmes. He is Chairman, National Technical Committee for Environmental Management System and Environmental Auditing (ISO/TC 207 TC1 and TC2). He was also Malaysian Expert Representative for ISO/TC 207 (EMS), ISO/TC 176 (QMS), ISC W Occupational Safety & Health Standards, ISO/TC 207 SC 6 on Climate Change and ISO/TMB/WG Social Responsibility Expert. He is Deputy Convener of MICCI Environment Committee and Chair of MICCI Climate Change Subcommittee. He is also a member of Malaysian National Standard Committee (MOSTI/DSM), the Technical Committee of Prime Minister's Hibiscus Award, the Environmental Quality Act (EQA) Drafting Committee (Ministry NRE) and the Environmental Auditing Regulation Drafting Committee (Ministry NRE)

Dr Loi holds a DBA from Universiti Utara Malaysia with his thesis on ‘The perception of ethics and social responsibility of MICCI Corporate Members in relation to the adoption of ISO 26000 - Social Responsibility". He holds a Masters in Business Administration, Scotland, UK (1993), Diploma in Management, MIM, Malaysia (1988), Certificate in Quality Technology, ASQ USA (1985) and a Diploma in Mechanical Engineering Malaysia (1982).

Dr Loi is a Fellow of Quality Society of Australasia (FQSA), Member of Institute of Quality Malaysia (MIQM), Member of American Society for Quality (MASQ), Member of Asia-Pacific Quality Organization (MAPQO) and Member of Malaysian Institute of Management (MMIM). He is a Registered Lead Auditor (ISO 9001; ISO 14001; SA8000; OHSAS 18001; & ISO/TS16949) and a Registered IRCA Lead Tutor (Lead Auditor Course (ISO 9001 & ISO/TS 16949) ISO/TS 16949:2002 Qualified Auditor).

In his spare time he is Deputy Commander of St. John Ambulance Malaysia Wilayah Persekutuan and MPSJ Town Councillor (2009/2010). Dr Loi was Secretary General of Transparency International, Malaysia until 2009