Summary
Overview
Work History
Education
Skills
Websites
Certification
Timeline
Generic
Serhiy Korchakovskyy Senyuk

Serhiy Korchakovskyy Senyuk

Telefónica Office Project Security Technical Engineer SASE
Madrid

Summary

Specialist in networks and cybersecurity with over 8 years of hands-on experience in corporate environments. Focused on the design, implementation, and management of SSE, SASE, and ZTNA solutions, as well as the administration of critical data center infrastructures. Experienced in leading technologies such as Zscaler, Netskope, Cisco Umbrella, Palo Alto, and Fortinet, combining strong practical expertise in enterprise networks with specialization in cloud security and Zero Trust models. Proactive, results-driven, and skilled at designing and maintaining secure and scalable solutions while ensuring efficiency and protection in digital environments.

Overview

10
10
years of professional experience
16
16
Certifications
4
4
Languages

Work History

Office Project Security Technical Engineer SASE

Telefónica Tech
06.2022 - Current
  • Deployment and migration of SSE and ZTNA solutions in large-scale infrastructures.
  • Design and implementation of security projects for Zscaler (ZIA/ZPA/ZDX), Netskope (SSE/NPA/DLP), and Cisco Umbrella.
  • Project management in cybersecurity and coordination with multidisciplinary teams.

Telefónica Office Project Security Technical Engineer

Westcon-Comstor
06.2021 - 06.2022
  • Support in the deployment of Safe Navigation (Zscaler, Umbrella proxy).
  • Participation in projects related to Zero Trust adoption and modernization of customer infrastructures.

Senior Network & Security Specialist

Grupo ICA
06.2019 - 07.2021
  • Management of data center core equipment (Cisco Nexus 9K, Catalyst 6500, Cisco ACI, Arista).
  • Perimeter security (Palo Alto firewalls), management of corporate proxies (Symantec, Zscaler, Cisco Umbrella).
  • Disaster recovery planning for backup data centers, technical documentation, and CMDB management in ServiceNow.
  • Network monitoring (Pandora, Allot, Syslog, TrueView).
  • Troubleshooting L2/L3 switching, network design (Visio), and corporate WiFi management (Cisco ISE, WLC, Aruba).

Network & Security Specialist

SERMICRO
03.2017 - 06.2019
  • L3/L4 support for Telefónica España corporate LAN.
  • Configuration of Cisco/HP switches, Radius, Bluecoat, Aruba, and corporate WiFi control (WCS/Aruba).
  • Follow-up on corporate VPNs (ARU/NAC) and internal services.

Systems & Network Technician

Business Wireless
01.2016 - 01.2017
  • Development and compilation of operating systems on OpenWRT/DDWRT (MIPS architecture).

Education

Advanced Vocational Training - Networked Computer Systems Administration

UNIR – International University of La Rioja
Madrid
06-2026

Advanced Course - Cybersecurity

Deusto Formación
Madrid
08.2025

Intermediate Vocational Training - Microcomputer Systems and Networks

IES Valle Del Miro
Madrid
06-2012

Skills

  • Cloud Security / SSE: Zscaler, Netskope, Cisco Umbrella

  • Networking: Cisco (NX-OS, IOS, ACI), Aruba Central, Corporate WiFi, MPLS

  • Perimeter Security: Palo Alto, Fortinet, Bluecoat

  • Tools: ServiceNow, Pandora, Allot, TrueView

  • Virtualization & OS: Linux, Windows Server, OpenWRT/DDWRT

  • Languages: Spanish (native), English (professional)

  • Team collaboration

  • Results-oriented

  • Continuous innovation

  • Strong client communication

  • Critical incident resolution

Certification

ZIA Certified Administrator

Timeline

Netskope Certified Cloud Security Integrator

12-2026

Netskope Administrator Accreditation

11-2026

Zero Trust Certified Architect (ZTCA)

05-2026

ZDX Administrator

05-2026

ZIA Certified Professional

05-2026

ZIA Delivery Specialist

05-2026

ZPA Delivery Specialist

05-2026

ZPA Support Specialist

05-2026

ZDX Administrator

05-2026

ZIA Certified Administrator

01-2026

ZPA Certified Administrator

01-2026

ZPA Certified Delivery Specialist

01-2026

Netskope Cloud Security Sales Associate

04-2025

Fortinet NSE 1 Network Security Associate

04-2024

Frtinet NSE 2 Network Security Associate

04-2024

Netskope Borderless SD-WAN Workshop

02-2024

Office Project Security Technical Engineer SASE

Telefónica Tech
06.2022 - Current

Telefónica Office Project Security Technical Engineer

Westcon-Comstor
06.2021 - 06.2022

Senior Network & Security Specialist

Grupo ICA
06.2019 - 07.2021

Network & Security Specialist

SERMICRO
03.2017 - 06.2019

Systems & Network Technician

Business Wireless
01.2016 - 01.2017

Advanced Vocational Training - Networked Computer Systems Administration

UNIR – International University of La Rioja

Advanced Course - Cybersecurity

Deusto Formación

Intermediate Vocational Training - Microcomputer Systems and Networks

IES Valle Del Miro
Serhiy Korchakovskyy SenyukTelefónica Office Project Security Technical Engineer SASE