Srinivas Nunna Email & Phone Number

San Jose, California, United States

Led 24/7 security operations, ensuring smooth shift transitions, accurate incident reporting, and continuous monitoring to maintain operational efficiency.• Managed DLP incidents in Microsoft Purview, phishing alerts, and security events by analyzing logs through Splunk SOAR and CrowdStrike, ensuring detection and response to potential threats.• Deployed Splunk SOAR for case management, integrating notables and creating automation playbooks and workbooks.• Integrated threat intel feeds from Crowd Strike Falcon X, enhancing the SOC's ability to identify and mitigate threats.• Led the implementation and fine-tuning of the Splunk and Logscale SIEM platforms and conducted regular vulnerability scanning with Tenable and address security weaknesses.• Enhanced email security and phishing protection with Proof Point and Know4be, reducing phishing attack success rates.• Streamlined Splunk log ingestion from various data sources, optimizing data capture.• Coordinate with SIEM vendors for tool upgrades and fine-tuning, enhancing alert accuracy.• Investigate SIEM alerts, conduct root cause analysis, and manage incidents within SLAs, enhancing overall security posture and response efficiency.• Maintained comprehensive documentation of all threat detection processes, audits, and incident reports.• Assisted in vulnerability management programs, conducting periodic assessments and patching security gaps across networks and applications.

India

Managed network security operations across 3 primary data centers and 26 global operational development centers.• Implemented HIPS policies for VPN users on Palo Alto PA-5220, PA-5430, and PA-7080 firewalls, and configured stealth rules to block unauthorized access to management VLANs preventing unauthorized access.• Deployed Palo Alto security profiles, including URL filtering and threat prevention, and set up Global Protect VPN to ensure secure remote access.• Performed software upgrades for firewalls, switches, and access points to maintain system stability and security.• Created airgap environment zones to isolate federal and GDPR VLANs, improving network segmentation and security.• Established AWS Direct Connect and IPsec VPN tunnels for secure, low-latency on-prem to AWS connectivity.• Implemented VLANs and VRFs on Cisco Nexus switches to achieve effective network segmentation, enhance security, and optimize traffic management.• Developed Python scripts using Netmiko and Paramiko for automated network device backups.• Connected multiple FEX modules to Cisco Nexus switches to expand server connectivity in a top-of-rack configuration.• Coordinated the implementation and documentation of network policies as per standards in daily operational activities.• Handled Incident, Change, Problem, Capacity, and Asset management, adhering to ITIL processes.• Designed High-Level Network architecture documents for internal use and ISO, SOC, US CFIUS, and FFIEC audits, preparing design documents post Go-Live for the project.• Maintained compliance with HIPAA and GDPR standards during audits, ensuring data privacy and protection.• Conducted deep packet analysis using Wireshark and tcpdump to diagnose and resolve network issues.• Delivered detailed reports to management, including metrics, staffing projections, root cause analysis, and collaborating with other teams for longer-term resolutions.

India

Resolved basic network issues and documented common issues and solutions for internal reference.• Assisted in network infrastructure setup, managed cabling, and conducted regular health checks on network closets.• Verified inventory physically to ensure adherence to standard operating procedures and reported findings.