The following is a complete list of current professional members of the IBO.

Shown beside each name is their professional status within the institute.

"Individual" indicates the person is, or has been, professionally engaged in pipe organbuilding or with its suppliers, although does not seek inclusion within the Register of Accredited Business Members. A self-employed organbuilder may therefore apply for Individual Membership, but would not be eligible for inclusion in the Register. In this situation, application for Business Membership is more relevant. Acceptance for Individual membership is at the discretion of the Board, and may sometimes involve a brief interview and/or examination of recent examples of work where appropriate.

"Associate" is an active employee or working partner of a Business Member. Acceptance as an Associate Member is at the discretion of the Board, but normally requires no tests beyond the accreditation process previously completed by the Business Member company.