Security Engineer III

Job description

As a Security Engineer III, you will lead the design, deployment, and ongoing management of secure Microsoft 365 GCC High environments for Marco’s CMMC-regulated customers. You will drive automation initiatives to streamline security operations, reduce ticket volume from our MDR provider, and deliver efficient, scalable incident response and vulnerability remediation. This position serves as a senior technical resource for customer environment hardening, compliance alignment, and security service delivery across Marco’s managed security portfolio. QUALIFICATIONS: - Lead the provisioning, configuration, and ongoing management of Microsoft 365 GCC High environments for CMMC-regulated customers, ensuring alignment with CMMC Level 2 and Level 3 requirements and DoD security standards. - Design and implement secure baseline configurations for Microsoft 365 GCC High, including conditional access policies, data governance, identity and access management, and compliance controls aligned to CMMC and NIST SP 800-171. - Serve as a primary technical resource for CMMC customer onboarding, environment hardening, compliance gap remediation, and ongoing support within managed Microsoft 365 GCC Hig...