Halliday had worked for FT.com for six years, after joining Financial Times in 1987. He will be responsible for the 12-strong newsdesk which runs across two weeklies - Financial Adviser and Investment Adviser - the daily news service on ftadviser.com and a monthly magazine, International Financial Adviser. All are targeted at workers in the financial advice sector and are run from the same newsdesk since its amalgamation 15 months ago.
Halliday replaces Angus Fisher, who has taken up a journalistic post in Canada, while Pomeroy takes over from Steve Sampson, who has moved to an undisclosed job in the Midlands.
The new appointees will report to FT Business editor-in-chief Kevin O'Donnell, who said a number of new projects were in the pipeline, though he refused to elaborate: 'We are looking at one or two relevant areas.'
The ownership of FT Business is still in question after the group, which also publishes Investors Chronicle and The Banker, was put up for sale by its owner, the quoted Pearson Group, in February.
A number of bids, including one from FT Group chief executive Stephen Hill, have been received.
A spokesman said: 'We are going through the process to consider the possible sale, and that process will take weeks or months.' Hill has temporarily stepped down to pursue the bid.
Meanwhile on The Financial Times, Andrew Slade has been appointed as financial news editor.
He replaces David Wighton, who has been made New York-based financial news editor.
Slade will be responsible for Companies and Markets, the paper's second section.
Other internal appointments include Lina Saigol as investment banking correspondent, Tony Tassell as investment correspondent and Andrew Parker as financial correspondent.