The post, which will come with a salary of around £65,000, has been vacant for 12 months after previous chief executive Sandra Loton-Jones stepped down in January last year on health grounds.
BALI hopes to fill the role by May. The association underwent a structural review in 2010 and unveiled a new mission statement supported by a 58-point strategic plan at its AGM in September.
National chairman Paul Cowell explained that Loton-Jones's resignation had been a catalyst for the board to "go back to basics and take stock".
He added: "We are in a stronger position now than we were back then. We are more confident, proactive, open and transparent. The new chief executive will play a fundamental role in implementing the new strategy as well as driving our ongoing development."
Improving BALI's online presence, including website updates and developing the organisation's programme of staff and member training, will be key responsibilities of the role, said Cowell.
"Our members have said they want more technical training so developing a continuing professional development programme and making sure members are well informed about new legislation such as planning regulations will be vital," he said.
Cowell added that after an induction the new appointment would "have to hit the ground running" and would be expected to "support, inspire and promote the association's members".
- Interested parties should email Paul Figg at Horticruitment on firstname.lastname@example.org