Background: Staff member's views and attitudes can have a significant impact on people with an intellectual disability. This study explores staff attitudes and experiences of people with an intellectual disability's expression of relationships and sexuality across service providers in Ireland. Methods: Staff (n = 86) from service providers (n = 5) completed the Attitudes to Sexuality Questionnaire-Individuals with an Intellectual Disability (ASQ-ID) and open-ended questions. Results: Multidirectional significant differences were noted on staff attitudes to sexuality based on demographic factors, that is, age, education, as well as non-demographics, for example, attendance at training, and active practising of religion. Qualitatively, three themes emerged: "Unsupported and Frustration"; "Taboo Subject Matter" and "Vulnerability and Access to Education". Staff reported a lack of service supports, dominant conservative cultures and people with an intellectual disability's vulnerability. Conclusion: This study highlights the need for improved service practices and enhanced provisions for staff and the people with an intellectual disability that they support.