Ir HO is a practicing engineer as well as a lawyer.  He graduated with BSc (Engineering) from HKU, then earned an MBA, a Post-graduate Diploma in Software Engineering, and PCLL from HKU; and LLB from Manchester Metropolitan University of UK.

Ir HO is currently the Chief Executive Officer of BEAM Society Ltd, the Chairman of Hong Kong Quality Assurance Agency, a Barrister-at-law at the High Court of Hong Kong, and an Adjunct Associate Professor of the University of Hong Kong, teaching engineering and legal subjects at both the graduate and post-graduate levels.

Ir HO had been working with Hong Kong Housing Authority as the Chief Building Services Engineer, heading the Building Services Section responsible for the design and construction of BS installations of all the new public housing development projects.

Ir HO is a Chartered Engineer, a fellow of the Chartered Institution of Building Services Engineers and a Corporate Member of Hong Kong Institution of Engineers (HKIE).  He is now the Director of the Hong Kong Green Building Council and had also served as a committee member of the Electrical Division and the Building Services Discipline Advisory Panel of HKIE apart other community services.

Ir HO has been devoted to promoting green building and BEAM Plus (Building Environmental Assessment Method) which aims at improving the overall quality of the built environment.