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Open to Work
IT Systems & Network Administrator

Tonirul Islam

CCIE Enterprise · Network Engineer · Builder
✉ tonirulislam@outlook.com 📞 +91-81589 85936 📍 Birbhum, W.B.-731216, India

Designing enterprise networks by day, shipping web products by night —
and writing about all of it at tonirulislam.tech.

3+
Years Exp.
3×
Cisco Certs
3+
Ventures
Ventures & Projects
Founder

A modern publishing platform for long-form essays, technical deep-dives, and ideas worth spreading. Built with a focus on clean reading experiences and writer-first tools.

Publishing Long-form Tech Writing
Founder

A fast, browser-based PDF toolkit — edit, convert, compress, merge, and split documents with zero installs. Supports Word ↔ PDF, PDF ↔ PowerPoint, PDF ↔ Excel, and more.

PDF Editor Word ↔ PDF Merge & Split Compress
Founder

A smart document and paper companion platform built for students, researchers, and professionals. Helping users organize, annotate, and collaborate on documents effortlessly.

Documents Research Collaboration

Network Engineer.
Curious Builder.

I'm a highly motivated Network Engineer with deep expertise in enterprise network design, advanced routing & switching protocols, and network automation. Currently at Radient Medical System (Apr 2023 – Present), I oversee the full network infrastructure — ensuring it stays performant, secure, and resilient at scale.

Beyond the rack and router, I build web products and share what I learn. I hold CCNA, CCNP Enterprise, and CCIE Enterprise certifications from Network Bulls, with hands-on experience spanning IP services, WAN technologies, Python-based automation, Palo Alto firewalls, and SDN. I founded themedium.blog, doccraftr.com, and papermitra.com — each solving a real problem for real users.

This blog is my public notebook — where networking meets software, and complex ideas become accessible stories.

Work History

Apr 2023 – Present
Network Engineer
Radient Medical System
Full-time

Responsible for comprehensive network administration, ensuring seamless connectivity, performance optimisation, and robust security measures across the entire organisation.

  • Administered and maintained the organisation's network infrastructure, ensuring optimal performance and security.
  • Implemented and configured advanced routing protocols (OSPF, EIGRP, BGP) to enhance network efficiency and reliability.
  • Managed switching technologies including VTP, MST, Rapid PVST+, and SD-Access for seamless operations.
  • Deployed IP Services — QoS, Multicast, NAT, NTP, SNMP, DHCP, and DNS to support business applications.
  • Developed high availability solutions using HSRP, VRRP, and GLBP, reducing network downtime significantly.
  • Automated network tasks with Python scripting and managed performance via Cisco DNA Center & SDN.
🏆 Enhanced network stability through proactive monitoring.
⚡ Improved performance via advanced routing & switching configs.
🛡️ Reduced network downtime by implementing HA solutions.
2026 – Present
Founder & Editor
The Medium Blog — themedium.blog
Venture

Built and launched a modern publishing platform for long-form essays, technical deep-dives, and ideas worth spreading.

2026 – Present
Founder & Lead Systems Engineer
DocCraftr — doccraftr.com
Venture

Built a fast, browser-based PDF toolkit supporting Word ↔ PDF, PDF ↔ PowerPoint, PDF ↔ Excel, merge, split, and compression — zero installs required.

2026 – Present
Founder & Product Lead
PaperMitra — papermitra.com
Venture

A smart document companion platform for students, researchers, and professionals to organise, annotate, and collaborate on papers seamlessly.

What I Work With

Routing & Protocols
🔀 OSPF
🔀 EIGRP
🌐 BGP / MP-BGP
🌍 DMVPN
🌍 MPLS
📡 SD-WAN
Switching & High Availability
🔁 VTP / MST
🔁 Rapid PVST+
🔁 SD-Access
HSRP
VRRP / GLBP
IP Services & Security
📡 QoS / Multicast
📡 NAT / DHCP / DNS
📡 NTP / SNMP
🛡️ 802.1X / AAA
🛡️ Cisco ISE
🔥 Palo Alto Firewalls
Automation & Tools
🐍 Python Scripting
🧠 Cisco DNA Center
🧠 SDN
🔍 Wireshark
🔍 Packet Analysis
Web & Dev
💻 PHP / HTML / CSS
⚛️ React
Java / C++
💻 Bootstrap

Academic Background

2013 – 2017
Graduation (B.Tech)
Techno India University, West Bengal
2012
10+2 — Higher Secondary
W.B.C.H.S.E Board
2010
10th — Secondary
W.B.B.S.E Board

Credentials & Training

CCIE
CCIE Enterprise Infrastructure
Cisco · Network Bulls
Expert
CCNP
CCNP Enterprise
Cisco · Network Bulls
Professional
CCNA
CCNA [200-301]
Cisco · Network Bulls
Associate
IBM
Software Foundation (Advanced) with C++
IBM Continuing Education
Advanced
INT
Core Java · Python · React
Internshala
Certified
INT
Web Development
Internshala — HTML, CSS, Bootstrap, PHP
Certified

Strengths & Soft Skills

🌐
Network Design
Enterprise-grade architecture across campus, WAN, and data centre environments.
🔒
Network Security
Zero-trust access, firewall policies, AAA, 802.1X, and threat prevention.
🤖
Network Automation
Python scripting, DNA Center, and SDN-driven operational efficiency.
🔎
Troubleshooting
Layer 1-7 analysis, Wireshark packet capture, root-cause identification.
🗣️
Communication
Translating complex technical concepts for stakeholders at all levels.
🧑‍🏫
Mentoring
Guiding junior engineers and sharing knowledge through writing and collaboration.