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Arunkumar Kuppusamy, Sr. Network & Security Engineer

Arunkumar Kuppusamy

Sr. Network & Security Engineer·Starlink / Ooredoo

قطر

بكالوريوس, Electronics and Communication Engineering

الخبرة العملية

مجموع سنوات الخبرة: 11 سنوات, 7 أشهر

Sr. Network & Security Engineer

فبراير 2024 - مارس 2026

Starlink / Ooredoo

الدوحة، قطر

فبراير 2024 - مارس 2026

• Managed user accounts, account provisioning, password resets, and access-level policies
across Microsoft 365 environments supporting 25, 000+ users.
• Performed daily system monitoring, verified integrity and availability of hardware, server
resources, and key processes; reviewed system and application logs and confirmed
scheduled jobs (backups, upgrades).
• Administered Active Directory infrastructure including group policies, security permissions,
and organizational units.
• Integrated wireless infrastructure with Cisco ISE and HPE ClearPass for 802.1X
authentication, NAC enforcement, and role-based access control, enhancing security
posture across OT/IT networks.
• Designed and maintained enterprise network architecture including Cisco Catalyst/Nexus
switching, ASR routing, and VLAN segmentation aligned with SLA requirements.
• Delivered L2/L3 incident response and resolution for P1/P2/P3 network and security events,
led RCA reports and drove corrective/preventive actions to closure.
• Troubleshot network connectivity issues (VLAN, DHCP, WiFi, TCP/IP) and ensured reliable
access across classrooms and offices.
• Maintained backup and disaster recovery solutions; conducted regular verification and
restoration drills to ensure business continuity.
• Created technical documentation including troubleshooting guides, knowledge base
articles, system configurations, and SOPs.
مجال الشركة:
الاتصالات والشبكات
الدور الوظيفي:
تكنولوجيا المعلومات

Network and Security Engineer

فبراير 2019 - فبراير 2024

Diyar United Company

الدوحة، قطر

فبراير 2019 - فبراير 2024

• Provided escalated IT support for enterprise servers, networks, applications, and security
systems with minimal downtime.
• Implemented and maintained virtualization platforms (VMware vSphere, Hyper-V), managing
resource allocation and high availability.
• Configured switches, routers, firewalls (Fortinet/Cisco), and wireless access points; applied
security controls per organizational policy.
• Proactively managed customer IT security posture, reducing system compromise events
and minimizing incident impact through continuous monitoring and action.
• Correlated security events across multiple data sources; mapped adversary behaviors to
MITRE ATT&CK, enhancing detection accuracy and incident response effectiveness.
• Conducted root cause analysis for complex wireless incidents across IT/OT environments,
delivering executive-level incident reports and technical recommendations.
• Supported IT projects including system upgrades, technology migrations, and infrastructure
enhancements.
مجال الشركة:
خدمات تكنولوجيا المعلومات
الدور الوظيفي:
تكنولوجيا المعلومات

Senior System Administrator

أغسطس 2014 - ديسمبر 2018

Al Bandary Engineering

الدوحة، قطر

أغسطس 2014 - ديسمبر 2018

• Managed enterprise IT infrastructure for 500+ users: Active Directory, Exchange Server, file
servers, backup systems, and network storage.
• Led Microsoft 365 migration from on-premises Exchange with zero data loss; implemented
collaboration tools and delivered user training.
• Performed daily system administration: user provisioning, mailbox management, security
group configuration, and technical issue resolution.
• Implemented backup and disaster recovery solutions with regular verifications and recovery
drills ensuring data integrity.
مجال الشركة:
الهندسة المدنية
الدور الوظيفي:
تكنولوجيا المعلومات

التعليم

Anna University

يناير 2014

يناير 2014

بكالوريوس، Electronics and Communication Engineering

الهند

Skills

IT Operations
Expert
IT Operations
Expert
Intrusion Detection
Expert
Intrusion Detection
Expert
Information Security
Expert
Information Security
Expert
Teamwork
Expert
Teamwork
Expert
TCP/IP
Expert
TCP/IP
Expert
INCIDENT RESPONSE
Intermediate
INCIDENT RESPONSE
Intermediate
SUPERVISORY CONTROL AND DATA ACQUISITION (SCADA)
Expert
SUPERVISORY CONTROL AND DATA ACQUISITION (SCADA)
Expert
information security
Expert
information security
Expert
SOAR
Expert
SOAR
Expert
Security Assessment
Expert
Security Assessment
Expert
EDR/XDR
Expert
EDR/XDR
Expert
TCP/IP
Expert
TCP/IP
Expert
SIEM splunk,Azure Sentinal, RSA netwitness
Expert
SIEM splunk,Azure Sentinal, RSA netwitness
Expert
endpoint security
Expert
endpoint security
Expert
SOC operations
Expert
SOC operations
Expert
itil
Expert
itil
Expert
IT support
Expert
IT support
Expert
team management
Expert
team management
Expert
Server Admin
Expert
Server Admin
Expert
Preparing SOC Reports
Expert
Preparing SOC Reports
Expert
IT operations
Expert
IT operations
Expert
Network Administration
Expert
Network Administration
Expert
windows server
Expert
windows server
Expert
Threat Detection
Expert
Threat Detection
Expert
WSA,IPS,IDS,
Intermediate
WSA,IPS,IDS,
Intermediate
firewalls
Intermediate
firewalls
Intermediate
cyber security
Expert
cyber security
Expert
web application security
Expert
web application security
Expert
system administration
Expert
system administration
Expert
risk management
Expert
risk management
Expert
computer hardware troubleshooting
Expert
computer hardware troubleshooting
Expert
Threat Hunt
Expert
Threat Hunt
Expert
Incident playbook
Expert
Incident playbook
Expert
vulnerability assessment
Expert
vulnerability assessment
Expert
COMPONENT DESIGN
Intermediate
COMPONENT DESIGN
Intermediate
COMPUTER AIDED ENGINEERING CAE
Intermediate
COMPUTER AIDED ENGINEERING CAE
Intermediate
COMPUTER NETWORKS
Intermediate
COMPUTER NETWORKS
Intermediate
DATA CENTERS
Intermediate
DATA CENTERS
Intermediate
IT SECURITY ARCHITECTURE
Intermediate
IT SECURITY ARCHITECTURE
Intermediate
LEADERSHIP
Intermediate
LEADERSHIP
Intermediate
NETWORK MANAGEMENT
Intermediate
NETWORK MANAGEMENT
Intermediate
OPERATIONS
Intermediate
OPERATIONS
Intermediate
SOFTWARE DEPLOYMENT
Intermediate
SOFTWARE DEPLOYMENT
Intermediate
BUSINESS OBJECTIVES
Intermediate
BUSINESS OBJECTIVES
Intermediate
CLOUD COMPUTING
Intermediate
CLOUD COMPUTING
Intermediate
INFORMATION AND COMMUNICATIONS TECHNOLOGY
Intermediate
INFORMATION AND COMMUNICATIONS TECHNOLOGY
Intermediate
PROBLEM SOLVING
Intermediate
PROBLEM SOLVING
Intermediate
PROCESS IMPROVEMENT
Intermediate
PROCESS IMPROVEMENT
Intermediate
PROJECT RISK MANAGEMENT
Intermediate
PROJECT RISK MANAGEMENT
Intermediate
SOLUTION ARCHITECTURE
Intermediate
SOLUTION ARCHITECTURE
Intermediate
TEAM LEADERSHIP
Intermediate
TEAM LEADERSHIP
Intermediate
VENDOR MANAGEMENT
Intermediate
VENDOR MANAGEMENT
Intermediate
ADAPTABILITY
Intermediate
ADAPTABILITY
Intermediate
INCIDENT MANAGEMENT
Intermediate
INCIDENT MANAGEMENT
Intermediate
INVESTIGATION
Intermediate
INVESTIGATION
Intermediate
SERVICE LEVEL MANAGEMENT
Intermediate
SERVICE LEVEL MANAGEMENT
Intermediate
AGILE PROJECT MANAGEMENT
Intermediate
AGILE PROJECT MANAGEMENT
Intermediate
BUSINESS DEVELOPMENT
Intermediate
BUSINESS DEVELOPMENT
Intermediate
COMPUTER SYSTEMS
Intermediate
COMPUTER SYSTEMS
Intermediate
EMBEDDED SYSTEMS
Intermediate
EMBEDDED SYSTEMS
Intermediate
INFRASTRUCTURE ARCHITECTURE
Intermediate
INFRASTRUCTURE ARCHITECTURE
Intermediate
MARKETING
Intermediate
MARKETING
Intermediate
MECHANICAL ELECTRICAL AND PLUMBING MEP SYSTEMS
Intermediate
MECHANICAL ELECTRICAL AND PLUMBING MEP SYSTEMS
Intermediate
OPERATIONS MANAGEMENT
Intermediate
OPERATIONS MANAGEMENT
Intermediate
SECURITY SYSTEMS
Intermediate
SECURITY SYSTEMS
Intermediate
CHANGE MANAGEMENT
Intermediate
CHANGE MANAGEMENT
Intermediate
CISCO CERTIFIED NETWORK PROFESSIONAL
Intermediate
CISCO CERTIFIED NETWORK PROFESSIONAL
Intermediate
FORTINET CERTIFIED NETWORK SECURITY PROFESSIONAL
Intermediate
FORTINET CERTIFIED NETWORK SECURITY PROFESSIONAL
Intermediate
IT INFRASTRUCTURE
Intermediate
IT INFRASTRUCTURE
Intermediate
NETWORK ACCESS CONTROL
Intermediate
NETWORK ACCESS CONTROL
Intermediate
SERVICE MANAGEMENT
Intermediate
SERVICE MANAGEMENT
Intermediate
SYSTEMS ENGINEERING
Intermediate
SYSTEMS ENGINEERING
Intermediate
TELECOMMUNICATIONS ENGINEERING
Intermediate
TELECOMMUNICATIONS ENGINEERING
Intermediate
WAN
Expert
WAN
Expert
MPLS/BGP/OSPF
Expert
MPLS/BGP/OSPF
Expert

اللغات

الانجليزية

متمرّس

العربية

مبتدئ

التدريب و الشهادات

الشهادات
CISSP (Certified Information system Security Professional)
SISE (Cisco Identity Services Engine) — Network Access Control and Policy Enforcement
NSE 4 (Fortinet Network Security Expert)
CCNP Routing & Switching (R&S) & Wireless
ITIL— IT Service Management, Change Management, Incident Management
CompTIA S+
Certified Ethical Hacker
CISSP
Fortinet NSE 4
ITIL
Cisco SISE
CCNP Wireless
CCNP Enterprise
CISSP
CompTIA S+
Certified Ethical Hacker
CISSP
Fortinet NSE 4
ITIL
Cisco SISE
CCNP Wireless
CCNP Enterprise
NSE
fortinet
CCNP
CEH
CCNA
ITIL
التدريب
IEC 62443
Networkhome