My Resume

Sylvester Zareba

linkedin.com/in/szareba

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Summary

Cloud, System & Infrastructure Architect with 12+ years designing and managing multi-platform cloud infrastructures across AWS, GCP, OCI, and Azure. Proven expertise in automation, security hardening, and optimizing enterprise IT environments. Hands-on experience architecting GPU-accelerated AI infrastructure (NVIDIA T4, A40) to support scalable machine learning workloads. Passionate about leveraging innovative cloud and AI technologies to drive efficiency and scalability in mission-critical systems.

Technical Expertise

  • Cloud: AWS (Lambda, EC2, VPC, IAM, CloudWatch), Azure, Google Cloud, OCI
  • Networking: Cisco, WatchGuard, F5 Load Balancers, VPN, VLAN, IPv6, TCP/IP
  • Automation: Python, Bash, PowerShell
  • Virtualization: Oracle VirtualBox, VMware (vSphere/ESXi), XenServer, Docker
  • Security: Penetration Testing, Metasploit, Rapid7, Qualys, Security Hardening
  • Databases: Oracle 11g, MariaDB, FileMaker Pro 13
  • OS Platforms: Windows Server 2019/2016/2012, CentOS, Ubuntu, FreeBSD, macOS

Professional Experience

Senior Cloud, System & Infrastructure Architect — JobDiva, New York, NY

May 2016 – Present

  • Architect and deploy multi-platform cloud solutions across AWS, OCI, GCP, and Azure.
  • Execute seamless migrations from on-premises or between tenants to the cloud.
  • Manage IAM policies, Security Groups, Load Balancers, NAT, public/private networks, Internet Gateways, and site-to-site VPNs.
  • Leverage CloudWatch for automation, real-time monitoring and logging; manage Elastic IPs.
  • Design and implement AWS VPCs, optimize EC2 instances, and implement serverless with Lambda.
  • Conduct penetration tests and vulnerability scans (Metasploit, Rapid7, Qualys) and remediate issues.
  • Create and maintain data center layouts, network diagrams, and cloud architecture documentation.
  • Develop automation with Bash/sh, PowerShell, and Python to increase operational efficiency.
  • Assist with audit processes such as SOC 1 & SOC 2.
  • Architect and deliver AI systems leveraging NVIDIA T4 and A40 GPUs for scalable ML workloads.
  • Configure, install, and maintain network equipment: Aruba/HP/FS switches, F5 LTM, WatchGuard firewalls.
  • Perform server installation, configuration, maintenance, and troubleshooting.
  • Support Linux/Unix, XenServer, and Windows Server 2008R2/2016/2019/2022 environments.
  • Administer Windows DC, Group Policy, Exchange; manage Active Directory/Office 365 and mailbox moves.
  • Install and manage SAN/NAS (Pac Storage, QNAP) storage platforms.
  • Create and manage DNS on Cloudflare, HE.net, Network Solutions, GoDaddy, and registrars.
  • Utilize Cloudflare registrar features including security and GTM/load-balancing.
  • Set up email servers (PowerMTA, Kerio Connect) and implement PTR, SPF, DKIM, and DMARC.
  • Perform software/firmware upgrades, configuration, and security hardening.
  • Provide mentorship and supervision of System Administrators; oversee team performance.
  • Evaluate IT operations and recommend enhancements.

System Administrator — Union Square Hospitality Group, New York, NY

May 2012 – May 2016

  • Installed and configured SAN/NAS storage devices.
  • Managed VMware/XenServer and Windows Servers (installation, configuration, administration).
  • Supported TCP/IP, DNS, DHCP, and RADIUS services.
  • Upgraded network equipment to stable firmware releases.
  • Configured and maintained Cisco firewalls/routers/switches/Wi-Fi/APs; performed backups.
  • Racked/stacked and maintained network devices, servers, UPS units, and batteries.
  • Performed backups and recovery with Veeam and Symantec Backup (2010/2013); rotated data cartridges.
  • Documented network issues, changes, and resolutions.
  • Supported multi-site connectivity (LAN, WAN, IP telephony) and remote connectivity (Citrix, Cisco VPN).
  • Resolved and escalated VoIP and Cisco IP phone issues.
  • Contributed to department projects (hardware/software migrations, deployments, moves).
  • Provided conference room support (EPSON, DELL projectors, Mondopad, Polycom).
  • Supported tablets/iPads/Surface and iPhone devices.
  • Coordinated with vendors to resolve desktop computing issues.
  • Tested and deployed new applications and systems.
  • Installed/upgraded/maintained Windows 7/8/10 and Mac workstations.
  • Implemented security solutions: Antivirus, Webroot, Microsoft Essentials, Malwarebytes.
  • Deployed and maintained printers/scanners, docking stations, and desktop/laptop hardware.
  • Provided desk-side and remote support (RDP, LogMeIn).
  • Troubleshot tickets and escalated to appropriate teams as needed.

Education

New York City College of Technology (CUNY) — Brooklyn, NY
Bachelor of Technology in Computer Systems — 2019

LaGuardia Community College (CUNY) — Long Island City, NY
Associate in Applied Science, Computer Operations — 2012

Certifications

  • Oracle Cloud Infrastructure 2024 Foundations Associate