Professional Membership is available to qualified members of the society who are eligible for an entry in Indexers Available, the Society's Directory. Eligibility criteria can be viewed here.
Members who take the SI 'Training in Indexing' course become Professional Members on achieving Accreditation.
Highly experienced indexers may also qualify as Accredited Indexers through an abbreviated testing procedure based on the SI course. Details available here.
Professional Members are entitled to use the postnominal MSocInd, and display the SI Professional Member logo on their stationery and websites.
When a Professional Member has reached a sufficient level of experience, they may apply for the Advanced Professional Grade.