Profileimage by Sergej Ostashchuk Senior Azure Architect, Network Architect, Security Architect from Bratislava

Sergej Ostashchuk

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Last update: 16.02.2024

Senior Azure Architect, Network Architect, Security Architect

Graduation: not provided
Hourly-/Daily rates: show
Languages: German (Limited professional) | English (Full Professional) | Slovakian (Native or Bilingual)

Attachments

cv_160224.pdf

Skills

I am a hands-on cloud architect, solution architect, technical product owner with 30 years of experience in building IT systems.
Hands-on cloud network engineer, security engineer, cloud data architect.

My recent experience:
- public, private and hybrid cloud architectures
- Azure networking: Virtual WAN network topology, hub-and-spoke network topology
Connectivity, SD-WAN, ExpressRoute, VPN, routing, BGP
- Azure security: policies, private access to resources, network security, firewall
- Azure identity and access management, users, service principals, managed identities, roles
- Azure infrastructure automation, Terraform, Azure CLI, PowerShell
- Data analytics in public and private clouds, DataOps
- Azure DevOps
- Technical leading and mentorship 
- Coordination between business, engineering and operations teams
- Fixing of troubled projects, delivery management
- Scrum, Agile

Project history

05/2023 - Present
Azure Architekt
isolutions AG (Internet and Information Technology, 250-500 employees)

Cloud platform design, landing zones, network architecture, VWAN, branch connectivity, ExpressRoute, VPN, Fortinet SD-WAN, routing, BGP, Palo Alto Firewall, Bastions, platform security, NSG, RBAC.
Infrastrucure as code, Terraform, Azure DevOps.

05/2006 - Present
Independent consultant | Co-Founder, CEO
Digital Rain (Internet and Information Technology)


03/2021 - 01/2023
Azure Architect, Cloud Data Architect
A1 Telekom Austria AG (Telecommunications)

Platform architecture, redesign, migration. Cloud networking, private connectivity, VPN, S2S, routing, firewals, NSG.
Data architecture, Synapse, Azure ML.
Cloud security, access management.
Infrasrtucture as code.

12/2016 - 06/2018
Big Data Architect
Munich Re (Insurance)


05/2015 - 07/2016
Big Data Consultant
Teradata (Internet and Information Technology)


04/2008 - 10/2012
Architect | Technical product owner | Lead Engineer
Openet (Telecommunications)


03/2004 - 04/2008
Architect | Technical manager | Delivery engineer
Orange (Telecommunications)


Certifications

Microsoft Certified: Cybersecurity Architect Expert
Microsoft
2024
Microsoft Certified: Azure AI Fundamentals
Microsoft
2024
Microsoft Certified: Azure Support Engineer for Connectivity Specialty
2023
Microsoft Certified: Azure Network Engineer Associate
2023
Microsoft Certified: Identity and Access Administrator Associate
Microsoft
2023
Microsoft Certified: Azure Data Fundamentals
2023
Microsoft Certified: Azure Solutions Architect Expert
2023
Microsoft Certified: Security, Compliance, and Identity Fundamentals
2023
Microsoft Certified: Azure Administrator Associate
2022
Microsoft Certified: Azure Fundamentals
2022
DataOps Methodology
2020
AWS Certified Solutions Architect – Associate
2019
MapR Certified Cluster Administrator v6 (MCCA)
MapR Technologies
2019
Certified Hadoop Administrator
2017
Certified ScrumMaster
2017
Certified Hadoop Developer
2016

Local Availability

Open to travel worldwide
Profileimage by Sergej Ostashchuk Senior Azure Architect, Network Architect, Security Architect from Bratislava Senior Azure Architect, Network Architect, Security Architect
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