John McNamara's departure from the body was announced at the BII national council of trustees' meeting last week. A successor has not yet been found and McNamara will help the BII to look for a replacement while he works his notice period.
He said: "Six years is a considerable time in any
chief executive position and the time has come for me to move on. I've thoroughly enjoyed my time at the BII; the team here is dynamic,
passionate about helping members and standing up for our sector.
"I have no doubt that the organisation will continue to play a huge role in supporting the industry through these tough times and beyond."
During McNamara's time as chief executive, the BII has processed more than 1.5 million individual vocational qualifications in subjects relating to the licensed retail sector and has launched social responsibility initiatives including Best Bar None, the Proof of Age Standards Scheme (PASS) and Challenge 21.
BII chairman Martin Grant paid tribute to McNamara and said he had boosted the organisation's profile and had left behind a strong foundation for future development.
McNamara will become the chief executive of the recently formed Alliance of Sector Skills Councils.