System/Security Administrator

⭐️ CoreStar is a dynamic technology company supporting partners in heavy-load industries with high-performance solutions. Our expert teams bring a startup-driven mindset, focusing on innovation, collaboration, and efficiency in every project. At CoreStar, you’ll have the opportunity to grow your skills, tackle exciting challenges, and directly contribute to impactful products.

📌 Key Responsibilities: 

Operational ownership and support of core security platforms, including:

Okta (SSO, MFA, lifecycle management, provisioning, troubleshooting)

Palo Alto Prisma Access & GlobalProtect (remote access, user/device policies, logs, incident troubleshooting)

Jamf (macOS endpoint management, security baselines, configuration profiles, application deployment)

Roll out, enforce, and maintain policies designed by the security team, ensuring stable and secure operation across identity, endpoint, and network access layers

Perform system administration tasks required to support secure operations, including:

Administration of Google Workspace (users, groups, email routing, security controls, DLP)

Installation, configuration, and maintenance of workstations, operating systems, and core applications

Management of endpoint configurations, software updates, and patching in coordination with Security

Manage identity and access lifecycle for employees and contractors (joiner–mover–leaver), ensuring accuracy, auditability, and least privilege

Administer and integrate SaaS platforms (Jira, Confluence, Slack, JetBrains, etc.), including access control, SSO enforcement, and role hygiene

Build and maintain automation and integrations using APIs and scripts (Okta, Jamf, Google Workspace, Slack) to reduce manual administrative work

Monitor system and security alerts, proactively investigate recurring issues, and participate in root cause analysis

Technical support for office and remote employees;

Collaborate with Security, Infrastructure, and SOC teams during incidents, access reviews, and platform improvements

Maintain documentation for system configurations, security operations, and incident handling procedures

📌 Requirements:

3+ years of experience in Security/Systems Administration, or a hybrid IT/Security role

Hands-on experience administering Okta and supporting SSO, MFA, and provisioning workflows

Practical experience with Palo Alto Prisma Access and GlobalProtect, including operational troubleshooting

Strong experience managing macOS environments via Jamf or similar products

Solid understanding of system administration fundamentals (OS configuration, patching, user management, SaaS administration)

Good understanding of the network concepts (LAN/WAN, VPN, LANs, DNS, DHCP, VPN, IP, routing etc);

Strong technical support and troubleshooting skills to resolve IT-related issues effectively;

Organizational and time management skills with the ability to manage multiple priorities;

Fluent in English and Russian 

📌 Nice to have:

Experience with Clouds (GCP, Azure);

Experience with CCTV and Access Control System.

📌 Benefits:
🏝 24 working days of paid annual leave 
🤝 6 days of paid sick leave  
🖊 Official employment
📄 Medical insurance
☕️ Coffee zone with fruit & snacks available in the office 
🥗 Corporate Lunch provided by the company
💪 Gym and sports classes 
🙌 Healthy and friendly work atmosphere  

Join us and be one of the Core Stars! ⭐