Dr Zheng Guoying is the Convenor of the SS 708 Working Group.

Dr Zheng leads the capability development and application engagement of Additive Manufacturing (AM) at ST Engineering and established AMDC in 2018. She contributes to various professional organisations, including the Singapore Additive Manufacturing Technical Committee and ISO JG 75.

Dr Zheng has held several senior roles at ST Engineering, such as Director of Technologies, Director of Engineering for aircraft seating solutions, Head of Cabin Interiors, Head of Structural Mechanics, and Head of Transport and Helicopter Integration since 1999. She is a Design Signatory of CAAS DOA and a Compliance Verification Engineer of EASA DOA.

A seasoned practitioner in various professional fields, Dr Zheng actively promotes engineering. She is a Member of IStructE (UK), a Chartered Engineer (UK), a Fellow of IES, and a founding Chartered Engineer of the IES Aerospace Chapter.

Dr Kelvin Loke is the Deputy Convenor of the SS 708 Working Group.

He is a deputy director at NAMIC, a Singapore government platform that focuses on translational research to develop and scale industrial adoption of digital additive manufacturing technologies.
He began his career in research and development of processes and applications related to thermal spray, cold spray, and advanced materials. He later expanded into areas covering machining, welding, heat treatment, coatings and additive manufacturing (AM).

Kelvin is involved in the ASTM APAC AM Centre of Excellence, and Singapore Standards AM Technical Committee. He was also involved in working groups for Technical Reference TR87:2021 - Safety of AM facilities.

He holds a Ph.D. in Engineering, and a Bachelor’s in Materials Science and Engineering.

Jeffrey started his career in 2007 as aircraft stress engineer at ST Engineering Aerospace and thereafter as powerplant structures engineer at Pratt & Whitney before joining CAAS in 2015. Jeffrey’s role at CAAS is to perform safety and regulatory oversight of aircraft type design validation, design and production organizations, and approval of design modifications and repairs. Jeffrey is also involved in approving the use of additive manufacturing technology for incorporation into design and production work processes by CAAS approval holders. Jeffrey holds a bachelor’s degree in mechanical engineering. He is a member of the SS708 Working Group.