Summary
Overview
Work History
Skills
Certification
Timeline
Generic

Patrik Sellergren

Brisbane,QLD

Summary

Results-driven Network Engineer with a strong track record of designing, implementing, and supporting network solutions in global enterprise environments. Proven expertise in diverse technologies, cloud networking, and troubleshooting. Seeking opportunities to leverage my skills and contribute to impactful projects.

Overview

19
19
years of professional experience
1
1
Certification

Work History

Network Technical Lead

Flight Centre
01.2020 - Current
  • Manage high-priority issues and provide expertise for global project rollouts
  • Planned and implemented the upgrade of Flight Centre's ACI fabric, replacing end-of-life APIC controllers in two datacenters
  • Redesigned extranet routing at Flight Centre, enabling transitive routing for improved traffic flow between sites
  • Conducted vulnerability analysis and executed remediation efforts on network devices
  • Led migration of a Major Business Centre from Cisco Catalyst to full-stack Meraki
  • Facilitated migration of F5 load balancers from on-premises to Google Cloud Platform.

Senior Network Engineer

Transurban
08.2022 - Current
  • Managed the Queensland MPLS backbone which interconnects all Queensland assets
  • Participated in Velocloud SD-WAN rollout
  • Designed the new Airport Link tunnel network which is currently in the PoC stages and is based on Cisco NCS platform and EVPN over MPLS
  • Successfully relocated a datacenter which housed network, security, and server infrastructure for Airport Link asset, ensuring uninterrupted tunnel operations

Network Solutions Architect

Atea Sverige AB
01.2019 - 01.2020
  • Led a project for a waste disposal company in the Malmo area, tasked with resolving historical network-related issues and implementing a robust solution
  • Conducted a thorough assessment of the existing network infrastructure and identified areas for improvement
  • Designed and implemented a solution that not only addressed the network issues but also met the customer's technical requirement to split their datacenter into two with redundancy for uninterrupted operations
  • Utilized ACI multi-pod architecture with centralised firepower firewalls to achieve the desired level of redundancy and security
  • Oversaw the replacement of end-of-life switches, installation of new fiber connections within and between datacenter sites, and creation of a new location for the second datacenter
  • Implemented 802.1x for both wired and wireless networks using Cisco Identity Services Engine (ISE)
  • Developed comprehensive documentation, including High-Level Designs (HLD), Low-Level Designs (LLD), implementation plans, and test plans, ensuring all customer requirements were met.

Associate Director

Takeda
01.2016 - 01.2019
  • Transitioned from Technical Consultant to Associate Director after having delivered on high visibility and high stakes projects within the organization
  • My role was to providing technical leadership for the Network function in the EMEA/APAC region
  • Led the migration of an end-of-life network refresh of a biotechnology factory in Switzerland, worked closely with the automation team to mitigate potential risks to critical processes during and after the migration
  • Designed a new corporate network architecture based on Catalyst 6807 modular chassis
  • Designed and deployed a physically separated manufacturing network
  • Implemented network segmentation and traffic separation within the manufacturing network using VRF-lite, with ASA Firepower firewalls enforcing traffic separation
  • Developed comprehensive documentation, including High-Level Designs (HLD), Low-Level Designs (LLD), implementation plans, and test plans for projects
  • Oversaw on-site installation activities, providing direction to a third-party team and served as the escalation point for technical issues
  • The design and migration approach that was performed for this manufacturing plant was followed for all manufacturing sites in the EMEA/APAC region
  • Created global company network standards based on site types, streamlining the rollout of new sites and improving operational efficiency.

Senior Network Engineer

Atea Sverige AB
01.2013 - 01.2016
  • Served as a Subject Matter Expert (SME) for various clients, including Sony, Assa Abloy, IKEA, and Baxter/Gambro
  • Designed developed documentation (HLD, LLD, Implementation plans and test plans) and traveled to Singapore to implement a datacentre footprint for Assa Abloy in the APAC region
  • Took on a leadership role as the technical lead for the Baxter/Gambro acquisition, overseeing the migration of existing networks to Baxter network standards
  • Traveled to critical factory locations in Europe to collaborate with stakeholders, develop technical plans, migration approaches, and address concerns
  • Developed documentation including Bill of Materials (BOM), High-Level Designs (HLD), Low-Level Designs (LLD), migration plans, and test plans
  • Supervised third-party work, ensuring adherence to plans and serving as an escalation point for troubleshooting and problem resolution
  • Played a pivotal role in a highly successful migration project
  • Transitioned to Baxalta after the spin-off, following recognition and recruitment by managers from the successful project.

Network Engineer

Telia Company
01.2005 - 01.2010
  • Configured network switches and routers.
  • Conducted remote Post-Verification Testing (PVT) during on-site device installations.
  • Provided third-level support for escalated incidents from level 1 and level 2 service desk.
  • Participated in a nationwide FTTH and FTTB network deployment project:
  • Evaluated back-end platform for automating service provisioning via web-based orders.
  • Assumed role of Subject Matter Expert (SME) and offered back-office support.
  • Developed automation script to streamline data input

Skills

  • Network Switching and Routing Platforms: Cisco Nexus, Cisco Catalyst, Cisco ASR9K/ASR1K, Cisco ISR, Juniper, Cisco Industrial Ethernet Switching, Hirschmann Switches
  • Firewalls: Palo Alto including Panorama, Cisco ASA, Cisco Firepower
  • Cloud Networking: AWS, GCP
  • Protocols: SD-WAN, TCP/IP, BGP, OSPF, VPN, IPSec, Routing, Switching
  • Change Management: ServiceNow
  • Data Center Migrations
  • Change Management

Certification

  • CCIE - Cisco Certified Internetwork Expert #36949 Routing & Switching
  • CCNP Enterprise
  • CCNP Routing & switching
  • Cisco Certified Specialist - Enterprise Advanced Infrastructure Implementation
  • Cisco Certified Specialist - Enterprise Core
  • CMNA - Cisco Meraki Network Associate
  • CCNA Routing and Switching

Timeline

Senior Network Engineer

Transurban
08.2022 - Current

Network Technical Lead

Flight Centre
01.2020 - Current

Network Solutions Architect

Atea Sverige AB
01.2019 - 01.2020

Associate Director

Takeda
01.2016 - 01.2019

Senior Network Engineer

Atea Sverige AB
01.2013 - 01.2016

Network Engineer

Telia Company
01.2005 - 01.2010

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Patrik Sellergren