Senior System Administrator

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior System Administrator based in the United States. This is a senior infrastructure role supporting secure, reliable, and high-performing enterprise technology environments.You will manage a broad technology landscape spanning Windows Server, Active Directory, AWS, Azure, and Microsoft 365.The role combines hands-on administration, cloud operations, infrastructure deployments, security, automation, and technical support.You will contribute to new environment builds, system upgrades, disaster recovery, monitoring, and capacity planning.As an escalation-level resource, you will troubleshoot complex infrastructure issues while meeting defined service levels.You will also collaborate with security and client teams, document operational standards, and mentor junior administrators.The position is remote or hybrid within the U.S., with occasional customer travel and scheduled on-call responsibilities.