Marlon Mejia Resume

Bloomberg LP

Datacenter Operations Engineer Nov 2020 - Feb 2025 - Fulltime

Data Center Operations:
- Rack and Stack: Installed and configured servers and network equipment.
- Decommissioning: Managed server and cable removal, data sanitization, and disposal.
Issue Diagnosis and Resolution:
- Address Layer 1 & 2 connectivity issues across 1000+ servers, switches, routers, and firewalls.
- Resolve issues across operating systems, including Windows and Linux (Red Hat, Debian) to ensure consistent and reliable functionality.
Automation:
- Led a project to automate case opening and log gathering across multiple systems by utilizing REST APIs and Python.
- Reduced operation time by over 98%, from more than 20 minutes to just 30 seconds per task.
Legacy Modernization: Contribute to the overhaul of outdated programs and documentation with Python, Bash, Git.
Containerization: Develop Dockerfiles to containerize and facilitate consistent deployment and testing of Python and Bash .
Incident Management: Utilize Jira to plan, track, support tickets, and manage incidents, ensuring efficient resolution.
Monitoring and Analysis: Servers and Network Devices across datacenters, tracking disruptions, resource utilization, and power consumption using Grafana, Splunk, and Humio.
Cross-Team Collaboration: Collaborate across multiple technical teams to deliver Agile-based projects, ensuring seamless communication and coordination across multiple Datacenter sites.
System Maintenance and Upgrades: Perform routine maintenance, hardware upgrades, firmware updates, and patch management, to ensure peak system performance.

NYI - New York Internet

Datacenter Technician Jul 2020 - Nov 2020 - Fulltime

Customer Support: Provided remote technical support, including device configuration,troubleshooting, and optimization.
Network Monitoring: Monitored over 1000 devices using LogicMonitor, ConnectWise, and Meraki. resolved outages and network issues.
Automation: Automated Google Drive tasks with Python scripts using Drive API.
Hardware Management: Installed and organized hardware, performed cabling and tested with Fluke equipment.
Customer Interaction: Communicated with clients about services and provided performance tips.
Documentation: Documented server setups and task methodologies for efficient handovers.

Skills

Tools: Docker, Active Directory, Excel, Command Line, SSH, SFTP

Infrastructure-as-Code: Terraform, Ansible

CI/CD: Jenkins, Github Actions, AWS CodePipeline

Operating Systems: Linux (RedHat, Debian, Ubuntu), Windows, Unix, iOS

Programming: Bash, Python, Powershell

Monitoring: Grafana, Splunk, Humio, Prometheus, Influxdb

Databases: MariaDB, MySQL, NoSQL

Cloud: AWS, ECS, EC2, VPC, IAM, cloud-init

Ticketing System: Jira, ServiceNow, Teams, Slack

Networking: IP, TCP, VLAN BGP, Server Load Balancers, Firewalls, ACL, DNS, NAT, DHCP, IPAM, LDAP, NFS, OPNSense, PfSense, Firewall, Load Balancer

Projects

CI/CD Project for AWS and GitHub Pages

Objective: Developed a robust CI/CD pipeline to automate the deployment of a static website hosted on AWS.

Technologies Used:

AWS Services: Utilized S3 for object storage, CloudFront for content distribution, and Route 53 for domain and DNS management. Implemented SSL certificates using AWS Certificate Manager for enhanced security.
Development: Created content in Markdown for ease of editing and used pandoc to convert Markdown files into multiple formats such as PDF and DOCX.
Automation: Implemented CI/CD pipelines using CodePipeline and GitHub Actions to automate the deployment and testing processes, ensuring seamless updates and multi-format document generation.

Outcome: Achieved a streamlined and automated workflow for static website deployment and maintenance, resulting in increased efficiency and reduced manual intervention.

Cloud Proxy Server (Diagram)

Objective: Designed and automated the deployment of secure, scalable cloud infrastructure on Oracle Cloud to expose local resources.

Technologies Used:

Infrastructure as Code: Automated the provisioning and management of cloud resources on Oracle Cloud with Terraform.
Configuration Management: Utilized Ansible to automate the setup and configuration of Wireguard VPN and NGINX on the provisioned infrastructure.
Reverse Proxy: Implemented a reverse proxy to securely route traffic to a Grafana local endpoint and a local website through a Wireguard connection between an OPNsense firewall and the OCI instance.
Security: Deployed CrowdSec on OPNsense to protect the reverse proxy, enhancing security and notifiying of any threats via webhooks.

Outcome: Established a robust, automated infrastructure that securely exposed local resources while enhancing performance and security.

Automated Provisioning with Proxmox, Terraform, and Ansible

Objective: Streamlined the provisioning and configuration of LXC containers and VM instances on Proxmox to enhance infrastructure management and automation.

Technologies Used:

Provisioning: Utilized Terraform to automate the creation of LXC containers and VM instances on Proxmox, enabling scalable and efficient infrastructure deployment.
Configuration Management: Applied Ansible for post-provisioning configuration and management, ensuring uniform setup and operational consistency.
Backups: Set up automated backups using Kopia, with infrastructure code securely stored in GitHub for version control and disaster recovery.

Outcome: Achieved a highly automated and efficient infrastructure management process, significantly reducing manual intervention, enhancing configuration consistency, and ensuring reliable backup and recovery.

STIG Compliance Configuration for Rocky Linux 9

Objective: Ensure Rocky Linux 9 adheres to DISA STIG Guidelines for RHEL 9, enhancing system security and compliance.

Tools Used: STIG Viewer, OpenSCAP, oscap, cscc

Outcome: Successfully configured a government-compliant, highly secure operating system.

Killercoda Labs

Objective: Leveraged to create a sandbox environemtn to guide users through step-by-step setups of specific technologies, serving as an interactive learning platform.

Outcome: Created educational hands-on labs leveraging virtualization to support and train emerging tech talent.