Overview: The Senior ITSM Administrator is responsible for the end-to-end administration, configuration, governance, and continuous improvement of the organization's Atlassian platform, including Jira Software, Jira Service Management (JSM), Confluence, and related tools and integrations. The ideal candidate combines deep Atlassian product expertise with strong ITSM process knowledge, excellent communication skills, and the ability to work cross-functionally with IT leadership, identity and access management teams, security operations, compliance, and business stakeholders.