PUTREVU PAVAN KRISHNA
Summary
Network & Systems Administrator with 6+ years of experience in administering enterprise network and server infrastructure across multi-site hospitals and diagnostic centers. Expertise in LAN/WAN, Layer 2/Layer 3 Switching, VLANs, Inter-VLAN Routing, STP/RSTP, Static Routing, SD-WAN, Sophos and FortiGate Firewalls, VPNs, Wireless Networking, Windows Server, Active Directory, DNS, DHCP, Microsoft SQL Server, IIS, and Wireshark. Experienced in collaborating with cloud infrastructure teams, supporting Microsoft Azure-based application deployments, and maintaining secure, scalable, and highly available IT environments for mission-critical healthcare applications (HIS/LIS/EMR/PACS).
Overview
1
1
Certification
7
7
years of professional experience
Work History
Network & Systems Administrator
Athentech
01.2023 - Current
- Administer and maintain enterprise LAN/WAN infrastructure across multiple hospitals and diagnostic centers, ensuring high availability, secure connectivity, and uninterrupted business operations.
- Configure, manage, and troubleshoot Layer 2/Layer 3 switches, VLANs, Inter-VLAN Routing, STP/RSTP, trunk ports, access ports, Static Routing, and TCP/IP networking to support enterprise communication.
- Configure and maintain WAN Failover, WAN Load Balancing, and SD-WAN policies to optimize branch connectivity, maximize application availability, and ensure seamless ISP failover.
- Administer Sophos and FortiGate Firewalls, including Firewall Policy Management, ACLs, NAT/PAT, SSL VPN, IPSec VPN, Port Forwarding, RBAC, and secure remote access for branch offices and remote users.
- Install, configure, and support enterprise wireless infrastructure, including wireless access points, SSIDs, WPA2/WPA3 security, MAC authentication, guest wireless access, and wireless performance optimization.
- Collaborate with cloud infrastructure teams during application deployments, hybrid connectivity implementation, VPN configuration, DNS integration, firewall rule implementation, and secure client access.
- Support Microsoft Azure application deployments by assisting with virtual networking, hybrid connectivity, infrastructure validation, and secure application accessibility.
- Deploy, configure, and maintain enterprise web applications on Microsoft IIS, including Website Bindings, SSL Certificates, Application Pools, Virtual Directories, DNS records, and firewall rule configuration to provide secure client access.
- Administer Windows Server 2012/2016/2019/2022, Active Directory, DNS, DHCP, Group Policy, File & Print Services, Microsoft SQL Server, and enterprise healthcare applications.
- Perform server installation, configuration, preventive maintenance, patch management, health monitoring, backup verification, disaster recovery validation, and system recovery activities to maintain stable production environments.
- Monitor network performance and firewall events using Wireshark, perform packet analysis, root cause analysis, and resolve Layer 2/Layer 3, routing, switching, firewall, VPN, DNS, DHCP, and Internet connectivity issues within SLA timelines.
- Coordinate with ISPs, infrastructure teams, database administrators, application teams, and third-party vendors during network upgrades, server migrations, cloud integrations, hardware replacements, and production incidents.
- Support and maintain mission-critical Hospital Information System (HIS), Laboratory Information System (LIS), EMR, and PACS environments, ensuring reliable connectivity for laboratory analyzers, barcode systems, diagnostic equipment, and clinical workstations.
- Prepare and maintain network topology diagrams, IP addressing documentation, firewall rule documentation, implementation reports, SOPs, and change management documentation to support operational excellence.
Technical Support Engineer
Athentech
01.2020 - 12.2022
- Supported deployment and implementation of enterprise IT infrastructure across hospitals and diagnostic centers, including Layer 2 switches, routers, wireless access points, servers, desktops, printers, barcode printers, biometric attendance systems, and CCTV surveillance systems.
- Performed structured cabling, cable termination, network rack installation, rack mounting, patch panel termination, cable management, cable labeling, and network connectivity testing during new branch implementations and infrastructure expansion projects.
- Installed, configured, and troubleshot Windows operating systems, HIS/LIS applications, Microsoft SQL Server client components, printers, barcode printers, scanners, biometric devices, CCTV systems, and end-user workstations for production environments.
- Configured TCP/IP, IP addressing, DNS, DHCP, shared printers, and network resources to establish reliable communication across hospital departments and branch locations.
- Assisted senior network engineers with VLAN implementation, Sophos Firewall deployment, NAT, SSL VPN, IPSec VPN, firewall policy validation, port forwarding, and network connectivity testing during customer implementations.
- Diagnosed and resolved Layer 1 and Layer 2 issues involving structured cabling, switch ports, routers, network adapters, desktops, printers, CCTV connectivity, biometric devices, and workstation network connectivity.
- Performed preventive maintenance, server hardware upgrades, and replacement of HDD/SSD drives, DIMM memory modules, Power Supply Units (PSUs), RAID components, and other server hardware to improve infrastructure reliability and minimize downtime.
- Supported implementation and go-live activities for Hospital Information System (HIS), Laboratory Information System (LIS), EMR, and PACS, coordinating with infrastructure, database, and application teams to ensure successful project delivery.
- Delivered end-user training, post-implementation support, and user acceptance testing (UAT) assistance to doctors, laboratory staff, hospital administrators, and operational users.
- Managed incidents through Zoho Desk, documented troubleshooting activities, tracked issue resolution, maintained implementation records, and ensured SLA compliance.
Education
MBA - Information Technology
Jain University
Skills
Networking
- LAN/WAN
- SD-WAN Technologies
- F5 Load Balancer (Good Understanding)
- Microsoft Azure (Fundamentals)
- TCP/IP (IPv4/IPv6)
- Routing & Switching
- Layer 2/Layer 3 Switching
- Static Routing
- Dynamic Routing Fundamentals
- VLAN
- Inter-VLAN Routing
- STP/RSTP
- Subnetting
- ACL
- NAT/PAT
- WAN Failover
- WAN Load Balancing
- Wireless Networking (Wi-Fi)
Network Security
- Sophos Firewall
- FortiGate Firewall
- Firewall Policy Management
- SSL VPN
- IPSec VPN
- Port Forwarding
- RBAC
- Network Segmentation
Infrastructure
- Windows Server
- Active Directory
- DNS
- DHCP
- Microsoft SQL Server
- File & Print Services
Hardware
- Structured Cabling
- Network Rack Installation
- Patch Panel Termination
- Cable Management
- Switch & Router Installation
- Wireless Access Point Deployment
- HDD/SSD Replacement
- DIMM Replacement
- PSU Replacement
- OS Installations
Certification
- Cisco Certified Network Associate (CCNA) - VerficationID(
672fa680d72e4e158e4eaef0f1b47025) - Fortinet Certified Associate (FCA)
- Sophos Firewall Engineer (ET80)
Timeline
Network & Systems Administrator
Athentech
01.2023 - Current
Technical Support Engineer
Athentech
01.2020 - 12.2022
MBA - Information Technology
Jain University