Peter Bishop, Haringey's£65,000-a-year director of technical and environmental services, will take up a similar position with Hammersmith and Fulham LBC in November.
Education director Jacky Tonge, on a similar salary, is also leaving in November, to become chief executive of Powys CC.
They are moving after the appointment of Haringey employee David Warwick as director of finance and corporate services on around£75,000 a year. Ms Tonge was so annoyed at the difference in salary that she considered taking Haringey to the Equal Opportunities Commission.
Mr Bishop said there was more money at Hammersmith 'but that was not necessarily my prime reason for moving'.
Haringey Labour councillors decided a year ago to raise top salaries by 20%, to attract 'top talent' from outside the borough. But they ignored chief executive Gurbux Singh's warning that the new pay levels would create resentment among existing staff, and rejected the idea of letting directors reapply for their own jobs at the new higher salaries.