Contact information

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Work experience

Server Infrastructure Team Lead

from 02.2022 to now (4 years 9 months)

* Coordinate the work of infrastructure administrators, including prioritization, workload tracking, blockers and dependencies.
* Review completed work and participate in troubleshooting where issues cross administrative boundaries.
* Participate in recruitment interviews, define infrastructure position requirements, and provide technical guidance to administrators and engineers.
* Maintain concise infrastructure documentation, knowledge base and runbooks covering access, dependencies, procedures and change management.
* Translate security and audit requirements into practical procedures for infrastructure administrators.
* Established practical change-management workflows distinguishing routine operational changes from changes requiring formal approval.
* Design infrastructure improvements based on operational, security and resource requirements.
* Participate in architecture of geographically separated facilities connected through secure VPNs and dynamic routing, including scalable multi-vendor routing.
* Design and implement centralized authentication and MFA for infrastructure administration, including Linux servers, Palo Alto administration and VPN access.
* Design and maintain centralized logging infrastructure and participate in security investigations, including reconstruction of incident timelines and identification of attack vectors.
* Designed and implemented centralized TACACS+ authentication, authorization and accounting for approximately 100 network devices, integrated with SSO.
* Implemented local certificate authority infrastructure and migrated services toward certificate-based LDAP/LDAPS authentication.
* Administer Linux server infrastructure and participate in modernization, backup, network security and service-reliability projects.
* Participated in migration of on-premises mail infrastructure to Microsoft 365 / Exchange Online.

Infrastructure / Systems Consultant

from 10.2019 to 02.2022 (2 years 5 months)
Defense-Oriented Organization (Ukraine), Київ (Оборонно-промисловий комплекс)

Joined after serious instability in the corporate mail infrastructure and lack of active infrastructure support.

* Stabilized the existing Zimbra mail environment and executed a planned migration to new infrastructure with minimal user disruption.
* Redesigned the single-server mail environment into a multi-service architecture covering mailbox storage, LDAP/Active Directory, MTA and SMTP relay.
* Integrated mail authentication with Active Directory and designed mail-security controls including SPF, DKIM, DMARC and SpamAssassin.
* Managed an environment of approximately 600 mailboxes and 250 GB of mail data, including resilience and SMTP-relay planning.
* Consulted on infrastructure architecture, network modernization, equipment selection, procurement and technical requirements.
* Participated in modernization of a mixed-vendor network environment.

Additional education and certificates

Cisco Certified Network Professional (CCNP)

2011

Cisco Certified Network Associate (CCNA)

2009

Cisco Certified Network Associate VoIP (CCNA Voice)

2012

Cisco Express Foundation for Field Engineers (CXFF)

2010

Knowledge and skills

• Уміння аналізувати
• Здатність до навчання
• Чесність
• UNIX
• Адміністрування ОС Linux
• Cisco
• Juniper
• FreeBSD
• Microsoft 365
• PaloAlto
• Firewall
• Управління командою

Language proficiencies

• English — fluent
• Ukrainian — fluent

Additional information

Approximately 15+ years of experience across Linux/FreeBSD systems, network infrastructure, enterprise mail, authentication, security, and infrastructure architecture.

Career progression from IT support and systems administration into infrastructure engineering, consulting, technical coordination, and team leadership.

Current responsibilities combine infrastructure administration with technical design, project coordination, procurement, operational process development, security improvements, and coordination of infrastructure administrators and cross-functional technical teams.

Particularly experienced in taking loosely defined infrastructure requirements, developing a practical technical approach, documenting it, coordinating the required work, and remaining technically involved where necessary.

Due to the ongoing war in Ukraine and the security considerations associated with my work, I have removed or anonymized the names of some organizations and clients from career history.

Seeking an Infrastructure Team Lead / IT Infrastructure Manager position in an organization or company with a professional IT environment, defined responsibilities and a collaborative management structure. Particularly interested in organizations working in humanitarian, public-service, development or other socially beneficial fields.