Марина

Maryna Koliuchok

Identity & Access Management / IT Security Professional

Kyiv, Ukraine | ■ [відкрити контакти](див. вище в блоці «контактна інформація») | ✉■ [відкрити контакти](див. вище в блоці «контактна інформація») | ■ [відкрити контакти](див. вище в блоці «контактна інформація»)

Professional Summary

Experienced Infrastructure and Security Engineer with a strong focus on Identity & Access Management (IAM), access
governance, and compliance. Skilled in auditing access rights, implementing role-based models, and ensuring
alignment with ISO 27001, NIST CSF, and corporate security standards. Adept at bridging technical depth
(AD/Exchange/Entra ID, firewalls, Office 365) with governance and business needs.

Currently seeking a role in Access Governance / Identity & Access Management / IT Security Audit, where I can
combine technical expertise with compliance, documentation, and process leadership.

Professional Experience

Infrastructure Engineer – PJSC Kyivstar, Kyiv (Mar 2021 – Present) - Conducted access rights audits, entitlement
reviews, and control testing for ISO and NIST certification. - Designed and implemented role-based access models
(RBAC) to streamline provisioning/de-provisioning. - Prepared and maintained system documentation, compliance
reports, and tender documentation. - Resolved user entitlement issues and ensured compliance with least-privilege
and SoD principles. - Administered and audited on-premises Active Directory, Exchange, and hybrid Microsoft Entra
ID/Azure AD environments at a global admin level. - Oversaw departmental financial controls, aligning IT operations
with budget planning.

Firewall Administrator – PJSC Kyivstar, Kyiv (Oct 2018 – Feb 2021) - Configured and maintained firewall rules for
more than 200 systems. - Strengthened network security posture and improved operations with proactive problem
resolution. - Delivered reliable customer support and streamlined incident management processes.

System Administrator / Security Administrator – JSC Ukrtelecom, Kyiv (May 2014 – Sep 2018 / Oct 2009 – May 2014)
- Managed accounts, systems, and patching schedules to ensure security and compliance. - Performed vulnerability
scans, remediated risks, and maintained secure data storage. - Provided 2nd/3rd-level technical support and
documentation for enterprise systems.

Education

Master of Science in Telecommunications Engineering – National University of Telecommunications, Kyiv, 2010

Bachelor of Science in Telecommunications – Odessa National Academy of Communications, 2009

High School Diploma – Kyiv College of Communication, 2007

Key Skills

• Identity & Access Management (IAM) • Access Rights Auditing & Compliance (ISO 27001, NIST CSF) • Role-Based
Access Control (RBAC) Design • Documentation & Tender Preparation • Microsoft Entra ID / Azure AD, Active
Directory, Exchange • Office 365 Administration • Firewall & VPN Configuration (Cisco, CheckPoint, Symantec) •
Governance, Risk & Compliance (GRC) Understanding