Glenn Jeyasingam Knight (born in 1945) is a Singaporean lawyer. He was the deputy public prosecutor in the trial of former magistrate Khoo Hin Hiong, and he also acted for the Prosecution in the trial of Adrian Lim. He later became the first Director of the Commercial Affairs Department (CAD) when it was founded in 1984. On National Day 1990, he was awarded the Public Administration Medal, Gold, for his work as Director of the Commercial Affairs Department.
Knight lost his post in 1991 after being convicted of corruption in a much-publicised trial. After this trial, Knight's was terminated as a civil servant. The High Court struck Knight off the roll of advocates and solicitors, meaning that he could no longer practise law. His Public Administration Medal, Gold was also revoked. In a second trial in 1998, he was again tried and convicted for misappropriating money while in office. This subsequent trial rendered him jobless, and he quietly faded from public life.