Dinesh Reddy

About Dinesh Reddy

Network Security Engineer with 4+ years of experience securing large-scale enterprise networks and hybrid cloud infrastructures across the U.S. and India. Specialized in designing and implementing resilient network architectures, detecting and neutralizing threats in real time, and ensuring secure connectivity for global operations.Expertise includes firewalls (Cisco ASA/Firepower, Fortinet, Palo Alto), VPNs (IPSec/SSL), IDS/IPS, Zero Trust, and SASE frameworks, with a proven ability to reduce incident detection and resolution times by 40% through proactive threat hunting, anomaly detection, and SIEM monitoring (Splunk, QRadar). Skilled in optimizing hybrid cloud security on AWS and Azure, leveraging GuardDuty, Security Hub, CloudWatch, and Azure Security Center.Strong background in automation and Security-as-Code, using Python, Ansible, Terraform, and CloudFormation to streamline operations, enforce compliance, and integrate security controls into CI/CD pipelines. Experienced in real-time vulnerability assessments, penetration testing, and patch management to uphold compliance with SOC 2, ISO 27001, GDPR, PCI DSS, HIPAA, and NIST standards.Completed a Master’s degree in Cybersecurity at the University of Tampa, with academic and practical focus on cloud security, network defense, and enterprise resilience. Known for collaborating with cross-functional teams — including DevOps, Cloud, and IT — to resolve incidents quickly, strengthen security posture, and drive continuous improvement.Passionate about advancing next-generation security strategies, integrating automation into network defense, and building future-ready infrastructures. Open to new opportunities and connections in cybersecurity, cloud security, and DevSecOps.

Experience

1. Network Security Engineer

   AT&T

   Jun 2024 — Present · CA, US

   Secured enterprise LAN/WAN and AWS cloud environments in real time, actively managing firewalls (Cisco ASA/Firepower, Fortinet, Palo Alto), VPNs (IPSec/SSL), IDS/IPS, and high-density Wi-Fi 6/6E networks supporting 500+ devices.• Continuously monitored live network traffic and cloud workloads with SIEM tools (Splunk, QRadar) and AWS services (GuardDuty, Security Hub, CloudWatch), detecting and neutralizing threats within minutes.• Conducted real-time threat hunting, anomaly detection, and incident response, reducing mean time to detect (MTTD) and mean time to resolve (MTTR) security incidents by 40%.• Configured and dynamically adjusted network segmentation, ACLs, VLANs, routing protocols (BGP, OSPF, EIGRP), and AWS VPC/subnet security to prevent lateral movement and block active threats across hybrid networks.• Implemented Zero Trust and SASE architectures, enforcing live access controls and secure connectivity for multi-site WANs, remote workforce, and hybrid cloud workloads.• Performed on-the-fly vulnerability scans, penetration testing, and compliance checks (SOC 2, HIPAA, PCI DSS, NIST), executing immediate remediation to neutralize risks.• Automated live security operations, cloud provisioning, and network configurations using Python, Terraform, Ansible, and AWS CloudFormation for rapid threat mitigation.• Secured AWS workloads in real time with IAM policy enforcement, Security Groups, VPC Peering, VPN tunnels, and hybrid connectivity, maintaining continuous compliance.• Integrated network security into CI/CD pipelines and live cloud deployments, applying Security-as-Code and automated alerting to prevent vulnerabilities during active operations.• Collaborated with DevOps, cloud, and IT teams on live incident investigations, rapid post-mortems, and policy updates, strengthening security posture in real time.