SMRT Corporation Limited (2012–2018)

On 1 October 2012, Kuek was appointed President and Group CEO of SMRT Corporation,^[9][10] a transport company providing rail, bus, and taxi services.

As group CEO, he was also responsible for taking the company private by selling it to Temasek Holdings on 29 September 2016.^[11]

Kuek led SMRT's rail transformation effort to renew and improve the ageing North-South and East-West Lines (NSEWL), Singapore's oldest, longest and most heavily-used MRT lines. The multi-year, multi-project renewal effort spearheaded by Singapore's Land Transport Authority (LTA) involves six major components and will stretch into the early 2020s:^[12]

1. Sleeper replacement: 188,000 wooden sleepers were replaced with concrete sleepers.
2. Power rail replacement: Some 200 km of Third Rails (Power Rails) and insulators were renewed.
3. Re-signalling project: The legacy Westinghouse fixed-block system (used since the late 1980s) was replaced by a communications-based train control system supplied by Thales.
4. Power supply system renewal
5. Track circuit replacement
6. Introduction of new trains

Working in partnership with LTA, three of the six projects were completed under Kuek's watch. These are the projects to renew the sleepers and power rails, and the re-signalling effort. A project with Otis Elevator Company to renew NSEWL escalators throughout the network began in August 2016 and is expected to be completed in the early 2020s.^[13]

In his review of Kuek's tenure, the Straits Times Senior Transport Correspondent Christopher Tan noted that Kuek led SMRT "during what was probably its most tumultuous period".^[14]

Tan wrote: "But even though his tenure was marred by incidents such as track deaths and tunnel flooding, he was part of the team – along with SMRT Trains chief Lee Ling Wee – which rebuilt the reliability of the North-South and East-West lines. As of the end of March this year, the North-South Line clocked an average of 604,000 train-km before a delay lasting more than five minutes; for the East-West Line, the figure was 272,000 train-km. These were some 10 times better than the lines' performance in 2011. The number of major breakdowns – those lasting more than 30 minutes – on Singapore's two oldest lines has also decreased to just one in the first quarter. At their worst, the two lines chalked up nearly one such breakdown each month. The Circle Line, which is likewise operated by SMRT, also posted a tenfold improvement in reliability over the same period to 1.8 million train-km between delays."^[14]

In a press statement on 18 April 2018, SMRT announced that former CDF Neo will replace Kuek as group CEO from 1 August.^[15]

Genium & Co (2018–present)

On 24 November 2018, the Straits Times reported that Kuek had founded a leadership consultancy called Genium & Co. The company is helmed by two former SAF officers, Fred Tan and Ang Yau Choon, who serve as managing directors. Tan headed the Singapore Armed Forces' Centre for Leadership Development while Ang served as commander of the SAF Commando Training Institute. Genium's principal activities are in organisational transformation, strategy execution, crisis leadership, experiential learning and performance excellence.^[16]

UBS (2019 to 2022)

Kuek joined Swiss investment bank UBS on 18 February 2019 as its Singapore-based divisional vice-chairman for global wealth management. UBS announced Kuek's appointment in a statement issued on 4 February 2019.^[17]

At UBS, he was concurrent Global Head of the Sustainable Finance Group, which is a commercially focused, cross-divisional group that supports the implementation of sustainability and impact strategy relating to sustainable finance across the firm. Kuek also chaired the UBS Optimus Foundation and directed the management of the UBS’ Singapore Program for Employability and Resilience (SUPER).

Temasek Trust (2023 to present)

In September 2022, The Straits Times reported that Kuek would join Temasek Trust, the philanthropic arm of Singapore's state-owned investment company, Temasek, as its executive director and chief executive officer from January 2023.^[18]

Miscellaneous

He was a member of the Centre for Strategic Futures Advisory Board and the Advisory Group for Civil Service Governance & Leadership (Human Resource).^{[citation needed]} He sits on the Civil Service College Board and chairs its audit committee.^{[citation needed]} He is currently a member of the Advisory Board at SAP Asia Pacific & Japan, Engineering College Advisory Board at Nanyang Technological University, and International Advisory Committee at the Lee Kuan Yew Centre for Innovative Cities at Singapore University of Technology and Design (SUTD).^{[citation needed]}

He also held directorships on the boards of the following companies: Housing and Development Board, from 2001 to 2003; International Enterprise Singapore, in 2005; JTC Corporation, from 2007 to 2010; Defence Science and Technology Agency, from 2007 to 2010; ST Engineering and its various subsidiaries, from 1994 to 2010.^[1][19]