Acceptance tests passed
Documented node-level acceptance validation ahead of Ready-for-Service.
4G / 5G Core Networks · Cloud-Native Engineering
Sergey
Levitskiy.
Packet Core Engineer | Production Networks & Automation
Engineering mobile networks where reliability is non-negotiable. 20+ years in telecommunications and IT, including hands-on 4G/5G core delivery, cloud-native network functions and automation at carrier scale.
Open to relevant opportunitiesCanadian citizen · Open to relocation
Designed for resilience
20+ yearsTelecommunications & IT experience
~15MConcurrent sessions on the national network supported
4G + 5GEPC and cloud-native core delivery
24/7Production engineering and incident support
Evidence, not just expertiseEngineering outcomes
Engineering outcomes
that speak for themselves.
A selection of documented production engineering and automation outcomes. Numbers reflect specific work examples rather than company-wide claims.
Production changes / year
Approximately 130–140 changes annually, with a documented sustained no-customer-impact record.
Estimated time saved per pass
Automation of an IMSI subscriber-migration workflow using Python, Jenkins and GCP.
Configuration findings
AMF configuration misalignments identified in an audit that informed an active standard.
Source: Sergey's career documentation. Each metric is from a distinct initiative. Bar lengths are decorative emphasis, not a common measurement scale.
Resume highlights
Download full resume ↓
The experience behind the results.
A concise view of Sergey's career, hands-on engineering work and qualifications. No download required to evaluate his background.
Most recent role · TELUS Communications · 2017–present in supplied resume
Wireless Core Engineer · Packet Core, DevOps & Systems Integration
Hands-on ownership across production 4G LTE EPC and cloud-native 5G standalone core: design, deployment, operations, incident recovery and automation for a national mobile network.
- Carrier-scale operations: Supported a multi-vendor packet core carrying approximately 15 million concurrent sessions, with 24/7 on-call participation and protocol-level incident analysis.
- Cloud-native 5G delivery: Deployed Ericsson AMF/SMF network functions on Red Hat OpenShift and Kubernetes, including sizing, IP planning, configuration and production readiness.
- Reliable change execution: Planned and delivered approximately 130–140 off-hours core-network changes annually with a documented zero-customer-impact record.
- Engineering automation: Built Python/Jenkins/GCP subscriber-migration workflows, with an estimated 116 hours saved per migration pass, alongside automated fleet-health checks.
- Deep troubleshooting: Investigated LTE and 5G registration, mobility and session-establishment faults using Diameter, GTP, SCTP, SIP and related signaling traces.
- Cross-vendor leadership: Coordinated incident bridges, authored root-cause analyses, managed Cisco TAC escalations and partnered with Ericsson and Samsung teams.
Earlier career
Telecommunications Specialist · TELUS2011–2017 · Infrastructure, service operations and complex troubleshooting
Customer Systems Engineer · WideZone2004–2010 · Broadband and wireless systems support
Career breadth: More than 20 years across telecom and IT, progressing from customer systems into live wireless-core engineering.
Technical toolkit
5G SA / LTE EPCAMF · SMF · MMEEricsson · CiscoOpenShiftKubernetesPython · BashJenkins · AnsibleGitLab CI/CDGTP · DiameterGCP · Splunk
Education & training
Bachelor of Computer Science & MathematicsKamchatka State University · 2003
Applied Network Administration & DesignBCIT · 2011
5G Core ArchitectureMpirical · 2021
Red Hat OpenStack AdministrationRed Hat · 2019
Highlights are drawn from Sergey's supplied career documents. The full resume includes additional role details, technical skills, education and training.
Discuss a role with Sergey ↗Selected engineering workFrom design decisions
From design decisions
to live-network delivery.
Explore four real-world examples of deployment, automation, reliability and validation.
Hover over a card to reveal the engineering details. On mobile, tap to flip; tap again to return.
Engineering mindset
Built for systems that cannot afford surprises.
Sergey combines deep packet-core expertise with operational discipline and the practical engineering needed to bring complex telecom platforms into service. His background spans system integration, protocol-level diagnostics, vendor escalation, performance tuning and automation.
Beyond implementation, he prepares documentation, teaches partner teams and develops tools that make networks easier to operate. His experience is anchored in carrier-scale live environments, not just lab projects.
Ericsson · Cisco · SamsungOpenShift · KubernetesPython · Jenkins · Ansible
Career
Experience across the network lifecycle.
From customer systems through national carrier core engineering, with an emphasis on production-grade systems and accountable delivery.
Wireless Core / Packet Core Engineer · TELUS
Core network-function design and deployment, 4G/5G integration, production changes, incident support, protocol traces, performance optimization and automated operational workflows. Hands-on Ericsson, Cisco and cloud-native platforms.
Telecommunications Specialist · TELUS
Telecommunications infrastructure, technical troubleshooting, service operations and cross-team resolution of complex connectivity issues.
Customer Systems Engineer · WideZone
Customer-facing systems engineering, wireless and broadband technologies, implementation and technical support.
Employment information reflects Sergey's supplied 2026 career documents; current employment status should be confirmed directly with Sergey.
Technical breadth
Specialist depth. Operational range.
5G
Packet core & signaling
AMF, SMF, UPF, MME, SGW, PGW; GTP, Diameter, SCTP, call-flow analysis and carrier-grade troubleshooting.
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Cloud-native telecom
OpenShift, Kubernetes, OpenStack, network-function deployments, capacity planning and infrastructure integration.
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Automation & delivery
Python, Bash, Jenkins, Ansible, GitLab CI/CD, runbooks, acceptance testing, change governance and incident response.
Recruiters & hiring managers
Let's discuss the engineering problem you need solved.
For roles in packet core, 5G infrastructure, telecom cloud-native platforms or network automation, Sergey welcomes a direct conversation.
levitskys@gmail.com ↗