Profileimage by Sergej Ostashchuk Senior Cloud Architect, Network Architect, Security Architect, Cloud Data Architect from Bratislava

Sergej Ostashchuk

available

Last update: 03.04.2024

Senior Cloud Architect, Network Architect, Security Architect, Cloud Data Architect

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

Attachments

cv_030424.pdf

Skills

I offer hands-on consulting from solution design till live operation,
using an effective combination of technical expertise and practical experience.
Usually I lead architecture and/or implementation.
I prefer pragmatic approach and value delivery.

Certifications:
- Azure Solutions Architect Expert
- Microsoft Cybersecurity Architect Expert
- Azure Administrator Associate
- Azure Network Engineer Associate
- Azure Security Engineer Associate
- Microsoft Identity and Access Administrator Associate
- Azure Support Engineer for Connectivity Specialty
- Microsoft Security, Compliance, and Identity Fundamentals
- Azure Data Fundamentals
- Azure AI Fundamentals
- IBM DataOps Methodology
- AWS Solutions Architect - Associate (expired)
- Certified ScrumMaster (CSM) - expired

Experience
- Public, private and hybrid cloud architectures, solution architecture
- Azure networking: various network architectures, Virtual WAN, hub-and-spoke
- On-premises connectivity, SD-WAN, ExpressRoute, VPN, routing, BGP
- Paloalto NGFW, Fortigate SDWAN
- Azure security: access management, private connectivity, network security
- Azure identity and access management, users, service principals, managed identities, roles
- Azure infrastructure automation, Terraform, Azure CLI, PowerShell
- Azure DevOps
- Data analytics in public and private clouds
- Technical leading and mentorship
- Writing documentation, technical specifications, user guides
- Detection and resolution of critical issues
- Coordination between internal teams and external partners
- Working as a bridge between business, engineering and operation
- Fixing of troubled projects, pragmatic delivery management

Project history

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

Role: Azure Architekt, Network architect

Project: central core cloud platform for a a leading global biotechnology company.

Responsibilities:
- hybrid cloud architecture - design and implementation
- technical leading for individual solution domains: networking, security, private connectivity
- infrastructure code development, automated deployments
- configuration, system integration, troubleshooting, testing, operation

Work topics: cloud platform core design, network architecture, global connectivity, VWAN, branch connectivity, ExpressRoute, VPN, Fortinet SD-WAN, routing, BGP, Palo Alto NGFW, 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
Leitender Azure Architekt - Infrastruktur, Landezone, Datenplattform, Netzwerken, Konnektivität, Zugriffsverwaltung
A1 Telekom Austria AG (Telecommunications)

Leitender Azure Architekt - Infrastruktur, Landezone, Datenplattform, Netzwerken, Konnektivität, Zugriffsverwaltung

- Azure cloud platform architecture
- Azure network architecture, hybrid cloud connectivity
- Azure identity and access management
- Azure Active Directory
- Azure Administration: infrastructure, networking, DevOps, IAM, RBAC
- Fixing issues in architecture, connectivity and security
- Azure infrastructure as code, templates, scripts
- IaC maintenance, review, fixing, further development
- Azure DevOps pipelines, automation
- VPN, firewalls, routing, DNS integration
- Data architecture, data lake, Azure Synapse, Azur Event Hubs, pipelines etc.
- technical leading of Azure platform architecture design, implementation and adoption by new corporate branches
- technical leading of migration to new Azure Landing Zone
- leading and education of new internal team members

Link to the reference: https://www.freelance.de/Freelancer/Senior_Azure_Architect

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 Cloud Architect, Network Architect, Security Architect, Cloud Data Architect from Bratislava Senior Cloud Architect, Network Architect, Security Architect, Cloud Data Architect
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