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Rostislav Grishin

Network & Infrastructure Specialist

I design, deploy, and manage enterprise network environments. 13+ years of building reliable, secure infrastructure — from single offices to 120+ distributed locations.

13+Years Experience
120+Locations Managed
99.9%Uptime Target
rostislav@grishinsystems:~$ whoami
Network & Infrastructure Specialist
rostislav@grishinsystems:~$ cat skills.conf
# Core Stack
Cisco Meraki | VLANs | VPN | L2/L3
OSPF | STP | DHCP | DNS | NAT
Zero-Trust | Wireshark | Nmap
rostislav@grishinsystems:~$ uptime
13 years, 0 days of downtime-free ops
rostislav@grishinsystems:~$
>_
☁️Cloud
🏢VPN
🖥️Servers
📹CCTV
🔌IoT
🏠Smart

Building Networks That Just Work

I'm an Infrastructure & Network Specialist based in Edmonton, Alberta with over 13 years of hands-on experience designing and managing complex L2/L3 network environments across both IT and OT systems.

My expertise lies in enterprise networking — VLAN segmentation, VPN architecture, and cloud-managed infrastructure. I've managed connectivity for 120+ distributed locations using Cisco Meraki, achieving 99.9% uptime with standardized, well-documented deployments.

Currently advancing toward my CCNA certification and looking for remote or hybrid network engineering opportunities where I can bring my experience with enterprise-scale infrastructure.

🇨🇦 Edmonton, AB ✓ Open to Remote 🎓 M.Eng Telecom 📚 CCNA In Progress

Core Expertise

Focused on enterprise networking, security, and infrastructure — not general IT support.

🌐

Network Architecture

Designing robust L2/L3 network topologies for enterprise and multi-site environments with high availability.

TCP/IPOSPFSTPSubnetting
☁️

Cloud-Managed Networks

Deploying and managing 120+ locations via Cisco Meraki dashboard with centralized monitoring and 98% config consistency.

Cisco MerakiUbiquitiAruba
🔒

VPN & Security

Engineering Site-to-Site and Client VPN tunnels for secure remote management of distributed automation systems.

S2S VPNCisco ASAFortinetACLs
🛡️

VLAN & Zero Trust

Strategic network segmentation isolating OT, CCTV, and security systems with zero-trust communication principles.

VLANs802.1QNATZero-Trust
🔧

Troubleshooting & Analysis

Deep-packet analysis and systematic debugging across heterogeneous environments. L1-L3 issue resolution.

WiresharkNmapTraceroute
📐

Infrastructure & Documentation

Rack design, structured cabling, UPS/PDU systems. Comprehensive As-Built documentation and topology diagrams.

VisioAs-BuiltCable Mgmt

Project Highlights

Real results from real deployments. Details anonymized for confidentiality.

01Cloud-Managed

120+ Location Network Rollout

Scaled and maintained a distributed network infrastructure using Cisco Meraki, ensuring centralized management and 98% configuration consistency across all sites.

120+Locations
98%Config Consistency
99.9%Uptime
02Security

Zero-Trust OT/IT Segmentation

Designed L2/L3 segmentation using VLANs to isolate OT, CCTV, and security systems. Implemented zero-trust communication across 100+ distributed nodes.

100+Nodes
5VLAN Zones
0Breaches
03Enterprise

Multi-Site VPN Infrastructure

Engineered Site-to-Site and Client VPN tunnels enabling encrypted remote management of distributed systems across multiple geographic regions.

S2SVPN Type
24/7Remote Access
AES-256Encryption
04Documentation

Infrastructure Standardization

Developed standardized network templates for switches and APs, reducing deployment time by 40%. Created comprehensive As-Built documentation for all sites.

40%Faster Deploy
70+Projects
FullAs-Built Docs

Latest Articles

Writing about networking, infrastructure, and my CCNA journey.

Credentials

🎓

Master of Engineering

Telecommunications

Almaty University of Power Engineering and Telecommunications · 2010 – 2012

🎓

Bachelor of Engineering

Telecommunications

Almaty University of Power Engineering and Telecommunications · 2006 – 2010

📜

CCNA

Cisco · In Progress — Expected 2026

VLANs, OSPF, STP, IPv4/IPv6, ACLs, DHCP, NAT, Port Security

Let's Work Together

Open to full-time, contract, or consulting opportunities in network engineering.

Ready to Connect

Whether you're looking for a network engineer, need a consultation, or want to collaborate on a project — I'd love to hear from you.

📍

Location

Edmonton, AB, Canada

🌐

Availability

Remote · Hybrid · On-site (Edmonton area)