Dhananjay Singh
Network Security Engineer
Gurugram
Summary
Network Security Engineer with 5+ years of experience in network security, technical support, and Cisco TAC. Expertise in troubleshooting and configuring network devices, proxies, and Web Security Appliances (WSA). Skilled in managing P1–P3 incidents within SLA, authentication protocols, and cloud security. Strong problem-solving, communication, and collaboration skills.
Overview
5
5
years of professional experience
2
2
Languages
Work History
Business Process Lead (Network Security Engineer)
Tata Consultancy Services
09.2024 - Current
- Managed security incidents and service requests for Zimmer Biomet project, resolving P1–P3 issues for Cisco WSA and related proxy devices within SLA timelines.
- Provided end-user support for Cisco WSA, proxy configurations, and network security, ensuring secure access and connectivity.
- Monitored, analyzed, and resolved proxy and network security issues, maintaining system integrity and minimizing downtime.
- Optimized network efficiency by regularly updating security protocols and software, ensuring compatibility with current technologies.
Cisco TAC Engineer (Network Security Engineer - Web Security Appliance)
Capgemini
07.2022 - 09.2024
- Delivered advanced support for Cisco WSA including web content filtering, malware protection, proxy configurations, and SSL decryption.
- Managed high-priority support cases and ensured timely resolution.
- Analyzed logs, packet captures, and configurations to diagnose HTTP/S traffic and authentication issues (LDAP, NTLM, Kerberos).
- Collaborated with global engineering teams to resolve systemic issues.
- Created technical documentation, RCAs, and knowledge base articles.
- Mentored junior engineers and participated in knowledge-sharing sessions.
Services IT DEV. Program Sr. Associate
NTT Data
09.2021 - 04.2022
- Provided Tier 2 support for proxy devices and network security systems, resolving complex hardware, software, and connectivity issues using remote diagnostic tools.
- Diagnosed and resolved errors related to proxy configurations, authentication, and network traffic across systems and applications.
- Optimized proxy management and security processes.
- Collaborated with cross-functional teams to drive successful completion of complex projects within deadlines.
- Tracked and managed proxy and security incidents in ServiceNow and JIRA, ensuring SLA compliance.
Analyst
HCL
11.2020 - 09.2021
- Administered and resolved user support tickets related to network security and proxy devices.
- Provided detailed troubleshooting and remote support for proxy servers, firewalls, and other network security systems.
- Documented technical issues and implemented corrective measures, escalating unresolved proxy and security incidents as required.
- Demonstrate expertise in incident, request, and ticket management within IT and network security workflows.
Education
B.Tech - Computer Science
SD College of Engineering and Technology
01.2020
Skills
Network Security & Web Security
Cisco TAC
Proxy configuration expertise
Proficient in TCP/IP and web protocols
Network protocol expertise
Product Support
Accomplishments
Capgemini WOW Award – Recognized for exceptional performance, Q3 FY23
Timeline
Business Process Lead (Network Security Engineer)
Tata Consultancy Services
09.2024 - Current
Cisco TAC Engineer (Network Security Engineer - Web Security Appliance)
Capgemini
07.2022 - 09.2024
Services IT DEV. Program Sr. Associate
NTT Data
09.2021 - 04.2022
Analyst
HCL
11.2020 - 09.2021
B.Tech - Computer Science
SD College of Engineering and Technology
Languages
English (Fluent)
Hindi (Native)