Meric Sheehan

Summary

Cloud-focused System Administrator Team Lead with experience designing, securing, and automating hybrid infrastructure across AWS and Azure environments in DoD-aligned settings. Proven expertise in Linux administration, infrastructure automation (Python, Bash, PowerShell), and implementing security compliance controls (STIGs, Nessus, ePO). Hands-on experience building and deploying cloud-native environments using Docker and Kubernetes on AWS. Secret cleared professional seeking Cloud/DevOps Engineering roles focused on scalable, secure, and automated infrastructure.

Skills

• Cloud Platforms: AWS (EC2, S3, CloudWatch), Azure (VMs, AD, networking)
• Containers & Orchestration: Docker, Podman, Kubernetes
• Infrastructure & Automation: Python, Bash, PowerShell
• Operating Systems: Linux, Windows Server
• Security & Compliance: STIGs, Nessus, ePO, Fail2Ban, NGINX
• Networking: Cisco routing/switching, DMVPN
• Monitoring & Tools: VMware, Power BI, SQL

Professional Experience

System Administrator Team Lead
DirectViz — 12/2022 – Present

• Led a team of system administrators managing hybrid Windows/Linux infrastructure in Azure, improving system uptime and operational efficiency across mission-critical environments.
• Performed advanced Linux administration, including system troubleshooting, performance tuning, and automation via Bash scripting.
• Set up Power BI data gateways and connectors for visualizations.
• Enforced DoD STIG compliance across Windows and Linux systems using ePO and SecurityCenter, reducing security vulnerabilities and improving audit readiness.
• Maintained SAS on Linux, troubleshot IIS and Tomcat servers.
• Coordinate multifaceted projects to maximize client productivity and system reliability.

Systems Engineer
American College of Radiology — Reston, VA — 07/2021 – 12/2022

• Maintained hybrid environment with strong security focus.
• Handled patch management, monitoring, and troubleshooting.
• Worked within ticketing systems for task management.
• Secured and maintained SQL Server environments.
• Interfaced with SOC team for rapid issue resolution.

Systems Administrator
ManTech — APG, MD — 02/2021 – 07/2021

• Worked with Windows Server, CentOS/Red Hat, Palo Alto firewalls, Cisco networking equipment.
• Supported agile development in secure environments.
• Managed Linux-based high-performance computing platforms.
• Maintained RPM repositories and wrote SQL scripts.

System Administrator
USMC — USA — 04/2017 – 02/2021

• Built and managed secure desktop/server Windows images.
• Deployed and maintained DMVPN connections.
• Applied security patches and managed service packs.
• Planned and deployed networks and services.
• Managed Call Manager and provider integrations.

Projects

• Skills-Testing App (2024 – Present):
  • Designed and deployed a scalable AWS-based platform using Docker and Kubernetes to provision ephemeral test environments, demonstrating cloud-native architecture and automation principles.
  • Integrated NGINX, Fail2ban, and Guacamole for secure, scalable test environments on Windows and Linux.
  • Leveraged AWS services (EC2, ECS, S3) and CloudWatch for monitoring, enhancing real-world skill assessment.
• SnailChat:
  • Developed a Dockerized, encrypted peer-to-peer Python chat app.

Certifications

• Security+
• AZ-104
• AWS Cloud Practitioner
• ESS ePO Administrator 201, 301

Other

Clearance: Active Secret Clearance