Дмитро

DMYTRO VIZHUTKIN

Senior Technical Support Engineer / Solution Design / Technical Management (TD,
Technical Lead, Technical Expert) / Electronics / Power systems / Batteries

Tier2 Support • Management • Design • Networking • DOCSIS • GPON • Transmission •
Broadband • Linux • Network Troubleshooting • Powering • Electronics • Circuitry, ICT

📍 Kyiv, Ukraine
📧 [открыть контакты](см. выше в блоке «контактная информация»)
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Languages: Ukrainian (Native), English (Fluent)

Employment Preference
Currently considering employment opportunities only with critical infrastructure enterprises
eligible to provide employee reservation (mobilization exemption) in accordance with
Ukrainian legislation.

Professional Summary
Senior Technical Support Engineer / Senior Network Engineer / Technical Lead (TL) / Technical
Director (TD), Technical Expert (TE) with 21+ years of experience in telecommunications and 19+
years of dedicated international technical experience, including almost 7 years of Tier 1 / Tier 2
support for Harmonic broadband solutions, TD/TE/NSE in Huawei.

Specialized in troubleshooting complex production issues across DOCSIS, GPON/PON, Core
Networks, CIN, Transmission (WDM, MW) and Linux-based systems. Extensive experience
supporting international telecom operators, performing Root Cause Analysis (RCA), incident
management, customer communication, SLA management, cross-functional collaboration
with software engineering teams.

Strong analytical mindset combined with hands-on networking knowledge and carrier-grade
telecom expertise gained through Huawei and Harmonic projects.
Experienced in resolving critical production incidents under SLA, performing log analysis, fault
isolation, escalation management, and customer issue resolution.

Electronic system design, testing and automation, circuitry, power systems, batteries

Target Positions
 Telecom & IT Support (ITC): Senior / Tier 2 Technical Support Engineer, Customer
Support Engineer, Technical Support Specialist, Network Support Engineer (NSE),
Technical Director (TD), Telecom Expert (TE)

 Hardware & Systems Engineering: Electronics and Circuitry (design, troubleshooting,
repairing), Drone design and maintenance.

 Infrastructure Design: Power systems/batteries engineering and maintenance,
Cooling/heating systems design and maintenance, System design, testing, and automation.

 Technical Management: Technical Director (TD), Process Development
 Other intersecting and adjacent positions are also interesting

Core Competencies & Professional Skills

Technical Support

 Product technical Support & Incident Management
 Product knowledge lifecycle and competencies to ensure a product support
 Problem Investigation, Root Cause Analysis (RCA)
 Technical problem investigation lifecycle (RnD escalation, confirmation, solution
implementation

Technical Management & Leadership

 Technical Solution Life Cycle Management (design, review, PAC rollout, integration)
 Project Intercommunication & Team Management
 Risk Analysis & Solution Risk Management
 Process Improvement & Knowledge Sharing
 PAC signing and project closure control
 SLA management

Customer and Internal Communication

 Interteam cooperation, responsibility matrix, joint problem solving approach
 Technical solution preparation and presentation, negotiation, and feedback management
 Troubleshooting joint intercommucation with Customer and team members (joint
troubleshooting, different phases and approaches)
 Technical Documentation & Project lifecycle documents signing
Technical Skills
Telecom (ICT)

 Access: DOCSIS, GPON, PON, xDSL
 Network monitoring and management, performance collection
 Transmission: WDM, DWDM, SDH
 Core networks: traffic processing, signalling
 Networking: routing, switching, segmentation (VLANs, VXLANs, etc.)

Electronics, Power & Hardware

 Circuitry Design and Troubleshooting
 Power System Design and Troubleshooting
 Batteries Design & Integration
 Cooling Technologies & Thermodynamics
 System Integration, Testing, and Validation

Operating Systems & Programming

 OS: Linux Administration, Windows Administration
 Environments: Shell Environment, Log Analysis
 Basics of programming and scripting: C++, Python, bash

Professional Experience
Harmonic Inc.
Senior Tier 2 Technical Support Engineer (2020 – Present), Tier 1 Technical Support Engineer
(2019 – 2020)

Supporting broadband products for international telecom operators.

Responsibilities
 Provide Tier 2 technical support for DOCSIS, GPON, and Core Network products.
 Troubleshoot HW/SW, configuration issues/incidents in Production environment, execute
Root Cause Analysis (RCA).
 Reproduce Customer’s issues in laboratory environments and collaborate with RND and
other divisions.
 SLA management
 Tier 1 team solution review and expertise, intercommunication with RnD, Customer
Management Team, Customer directly;
 Issues escalation, technical requirements preparation and review, control solution
implementation until the issue is closed.
 Maintain high customer satisfaction during critical incidents while managing SLAs.
 Participate in continuous process improvement and contribute to the internal knowledge
base.
 On-call support on regular basis (rotations)
Technologies
DOCSIS • GPON • PON • Broadband Networks • Linux • TCP/IP • Customer Support • Incident
Management • Datacom networking • CIN

Huawei Technologies
Technical Director / Technical Expert / Technical Lead
2007 – 2019

Delivered ICT technical expertise for wide amount of national and international telecom projects
involving carrier-grade infrastructure.

Responsibilities
 Managed solution delivery control, delivery points review, and team collaboration.
 Led network integration, troubleshooting, and OSS/NMS deployment.
 Implemented DWDM/MW/NMS-OSS-BSS rollout and support for major national carriers.
 POC project implementation
 Customer technical satisfaction management
 Provided technical leadership, acceptance testing, and on-site/remote customer technical
support.
 Technical account management

Major Customers
 Ukrtelecom
 Kyivstar
 MTS Ukraine
 lifecell (Astelit)
 Vega
 MegaFon

Kyivstar
Security Department Analyst
2005 – 2007

Responsibilities
 Network risk assessment (technical side) – network fraud analysis;
 Procedure development - Incidents prevention: company, subscribers, government;
 Security department structure optimization;
 Company structure verification and control;
 Interaction with Ukrainian Security Service, other governmental structures
 Contract review for possible risks
 Other departments operation review and control
 Report preparation for CSO, CEO;
 Other incident investigations participation
 Operational support

SSL "Skyline"
Hardware / Software Test Engineer
2002 – 2005

Responsibilities
 System architecture (HLD, LLD, including circuitry, algorithms design, software design);
  System realization (including prototype design, piloting, algorithms verification and
adaptation);
 HW/SW/integration tests and solution verification
 Commercial realization of the prototype (e.g.
https://ko.com.ua/test_50_blokov_pitaniya_atx_18944 )
 Product certification initiation

Key Achievements
 21+ years in telecommunications
 19+ years of international technical experience
 Extensive high level support background
 Successfully supported carrier-grade broadband solutions worldwide
 Strong experience resolving complex production incidents
 Proven expertise in customer-facing technical support
 Worked directly with engineering teams on software defect investigation
 Broad knowledge of DOCSIS, GPON, Linux and IP networking
 Experience supporting mission-critical telecom infrastructure
 Procedure development, business processes optimization
 Experience of system design (both HW/SW), realization, testing, automation
 Power systems design and integration

Professional Development
Technical Training
 Harmonic Internal Products and Processes Training
 Huawei Internal Products and Processes Training
 Broadband Technologies, Linux, intercommunication
 Artificial Intelligence
 Thermodynamics of Cooling Systems
 Others

Personal Interests
Electronics, embedded systems, automatization, networking, power engineering, applied physics,
renewable energy technologies, and smart infrastructure.