Senior Cloud Security Engineer (AWS & GCP)

Description Quantum Sky is hiring a Senior Cloud Security Engineer (AWS & GCP) to join our team of cloud, security, and compliance experts. This role is primarily focused on day‑to‑day security engineering, including system hardening, vulnerability remediation, cloud operations, and security tool management across AWS & GCP environments. In addition to regular business‑hours responsibilities, engineers participate in a structured after‑hours 24×7 on‑call rotation (primary or backup) to support response to incidents, alerts, and escalations for customers operating under FedRAMP, FISMA, and NIST 800‑53 frameworks. Responsibilities: Perform systems administration and maintenance including patching, vulnerability scanning, compliance scanning and remediation, backups, and recovery for cloud workloads. Support AWS & GCP environments, including Windows and Linux virtual machines, container workloads, and cloud services such as EC2, EBS, S3, RDS, WorkSpaces (AWS), Compute Engine, Cloud Storage, Cloud SQL (GCP), and Active Directory or equivalent identity services. Configure, update, and maintain security tools for endpoint protection, log collection, vulnerability scanning, and compliance monitoring. Troubleshoot issues across network, compute, application, and identity layers by reviewing logs, collecting data, and analyzing system behavior. Implement hardening and compliance controls using CIS Benchmarks, DISA STIGs, and FedRAMP requirements. Remediate vulnerabilities