Sylvester Zareba
Executive Summary
Technology executive with 15+ years of experience leading enterprise infrastructure, cybersecurity, cloud architecture, networking, and data center operations for mission-critical SaaS environments. Currently serving as Chief Information & Security Officer (CISO) responsible for enterprise security strategy, cloud platforms, infrastructure operations, operational resilience, and technology modernization initiatives. Proven track record managing multi-cloud environments (AWS, Azure, OCI, GCP), enterprise networking, security programs, disaster recovery, data center operations, and large-scale infrastructure projects. Hands-on technical leader responsible for a 42-rack production environment, team leadership, technology procurement, vendor management, and infrastructure strategy.
Key Highlights
- Chief Information & Security Officer (CISO)
- Responsible for a 42-rack production Data Center environment
- Lead and mentor team of 4 Systems Administrators
- Multi-cloud architecture (AWS, Azure, OCI, GCP)
- Enterprise networking (Cisco, Aruba, HPE, F5, WatchGuard)
- SOC 1 / SOC 2 support AI infrastructure (NVIDIA T4 / A40)
- Procurement and vendor management
- Disaster recovery and operational resilience
- Enterprise Infrastructure LeadershipI
Professional Experience
Chief Information Security Officer (CISO) — JobDiva, New York, NY
May 2026 – Present
- Lead enterprise infrastructure, cybersecurity, cloud operations, networking, and operational resilience.
- Direct information security strategy, vulnerability management, security governance, and compliance initiatives.
- Responsible for overall technology operations supporting mission-critical SaaS environments.
- Partner with executive leadership on infrastructure planning, cybersecurity strategy, operational continuity, and technology modernization initiatives.
Chief Information Security Officer (CISO) — JobDiva, New York, NY
May 2016 – May 2026
- Following the retirement of the CTO and consolidation of infrastructure responsibilities, assumed leadership responsibility for Data Center operations, infrastructure strategy, cloud architecture, cybersecurity initiatives, and enterprise technology planning.
- Evaluate enterprise technology strategy, operational risk, infrastructure investments, and technology modernization initiatives in partnership with executive leadership.
- Responsible for enterprise infrastructure operations across a 42-rack production data center environment supporting networking, virtualization, storage, cloud connectivity, cybersecurity, and mission-critical SaaS platforms.
- Provide strategic and operational leadership for cloud, infrastructure, cybersecurity, networking, and Data Center operations supporting mission-critical SaaS platforms and global business operations.
- Lead and mentor a team of 4 Systems Administrators responsible for cloud infrastructure, cybersecurity, networking, systems operations, and enterprise support.
- Architect and deploy cloud solutions across AWS, Azure, OCI, and GCP.
- Lead infrastructure modernization, cloud migrations, security initiatives, and enterprise architecture projects.
- Direct technology procurement, vendor selection, contract negotiations, infrastructure planning, and strategic technology investments.
- Support SOC 1 and SOC 2 audits and security initiatives.
- Architect and deploy AI infrastructure leveraging NVIDIA T4 and A40 GPUs.
- Design and maintain enterprise networking utilizing Aruba, HPE, FS, F5, Cisco, and WatchGuard technologies.
- Provide multi-site infrastructure leadership supporting operations across the US, UK, Lebanon, and Pakistan.
System Administrator — Union Square Hospitality Group, New York, NY
May 2012 – May 2016
- Managed VMware, XenServer, Windows Server, SAN/NAS storage, backup and recovery platforms.
- Supported enterprise networking, Cisco infrastructure, Citrix environments, VoIP systems, and multi-site operations.
- Participated in major infrastructure upgrades, migrations, deployments, and operational support initiatives.
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