Singapore had previously reported 47 cases of the new virus. Singapore's government has been reportedly trying to calm nerves after it had raised the virus alert last week which also sparked the panic buying of essentials such as rice and toilet paper.
The infected employee was tested on Tuesday and the bank was informed of the confirmation on Wednesday morning, the DBS bank said in a statement.
"During this hard time, the bank will be providing this employee and his family with every support and guidance", DBS said, according to the BBC.More news: Vietnam quarantines commune of 10000 over coronavirus
People enter Marina Bay Financial Centre Tower 3 where DBS headquarters is situated in Singapore on February 12, 2020.
The bank employs more than 5,000 people at MBFC, where it occupies 18 floors in one tower.
The bank's investment in boosting its digital capabilities means there is "minimal service disruption at this point in time" as its bankers are well-equipped to work from home amid continued appetite in the market, he said, noting a deal closed just yesterday. The DBS said it was conducting contact tracing with all employees and other people the infected person may have come into contact with. Warnings by building management of cases in some downtown office buildings have also been widely shared on social media.
Business continuity plans have kicked in for some companies, and office buildings have begun temperature screening of workers and visitors.More news: Who paid for Boris Johnson's luxury holiday?
The outbreak has revived memories of Severe Acute Respiratory Syndrome (SARS) which killed more than 30 people in Singapore in 2003, and almost 800 worldwide.
DBS Group Holdings Ltd (星展銀行) said it expects the COVID-19 outbreak to hurt revenue slightly this year as it unveiled steps to alleviate its impact on small businesses and home owners.
Care packs with thermometers, masks and hand sanitisers were given to the evacuated employees and the bank said a medical helpline was already in place.More news: The Batman: First Look at Robert Pattinson in Batsuit