Ranjit Warrier

• Designed secure network architectures embedding NIST and CIS controls, ensuring compliance across voice and network platforms.
• Established cybersecurity governance frameworks and conducted risk assessments, delivering mitigation plans to reduce vulnerabilities.
• Led modernization initiatives, retiring legacy compliance tools and migrating to Qualys Guard, resulting in significant cost savings.
• Directed a team of 15 to deploy regulatory controls and automated compliance reporting, enhancing security posture and operational efficiency.

• Designed, deployed, and managed enterprise LAN, WAN, and SD-WAN networks using Versa SD-WAN, Cisco routers, and switches to ensure scalable, secure connectivity.
• Troubleshot and resolved complex network issues (routing, switching, firewalls, DHCP, DNS) while leading network upgrades and vulnerability mitigations.
• Spearheaded Infoblox upgrade across 62 sites with 100+ devices in active-standby mode, achieving zero downtime and a 100% success rate.

• Acted as Subject Matter Expert (SME) for BT customer network connectivity, managing escalations and ensuring consistent, reliable service delivery for key clients.
• Developed high-level designs (HLDs), network configurations, and Visio diagrams; managed change control processes and resolved network issues using root cause analysis techniques.

Project Manager Responsibilities

• Prepared monthly team performance and resource cost reports; coordinated strategic reviews with senior management and finance.
• Led weekly team meetings, managing over 10 Network Engineers; conducted performance reviews, coached members, and partnered with HR for resource planning and hiring to optimize team productivity and growth.

Network Designer Responsibilities

• Served as Subject Matter Expert (SME) and primary contact for BT network connectivity, managing escalations and delivering client-focused network solutions.
• Created high-level design (HLD) documentation, prepared detailed network configurations, led Change Advisory Board (CAB) meetings, and resolved network issues through root cause analysis and cross-team collaboration.