Open to opportunities

Onur Cepheli

@onurcepheli

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Senior Cybersecurity Engineer with 15+ years of experience.

Germany

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What I'm looking for

I am seeking a challenging role in cybersecurity that fosters innovation and growth.

With over 15 years of experience in cybersecurity, I have dedicated my career to safeguarding critical systems across various high-stakes industries, including space, banking, and telecommunications. As a Senior Cybersecurity Engineer at Starion GmbH, I lead efforts within the European Space Agency's Security Operations Center, focusing on optimizing security operations and incident response strategies. My expertise lies in managing advanced security tools, developing playbooks, and enhancing threat detection capabilities.

Throughout my career, I have successfully implemented robust security measures and policies that align with industry standards such as ISO 27001. My previous roles at CS Group GmbH and HE Space Operations GmbH involved conducting security assessments, managing network security devices, and ensuring the integrity of IT infrastructures. I am a certified CISSP professional, skilled in translating complex technical challenges into actionable solutions, and I am passionate about driving continuous improvement in cybersecurity practices.

Experience

Work history, roles, and key accomplishments

Current

Senior SOC Engineer

Current

Starion GmbH

Jan 2025 - Present (4 months)

As a Senior SOC Engineer at the European Space Agency's Security Operations Center, I manage and optimize security operations to safeguard critical systems. My role includes administering SOC tools, implementing security controls, and contributing to incident response procedures.

Incident Response SOAR Platform Optimization Network Security Threat Detection Infrastructure Security

Network & Security Expert

CS Group GmbH

Aug 2022 - Jan 2025 (2 years 5 months)

As a Network & Security Expert for EUMETSAT, I implement and maintain security tools, conduct security assessments, and develop network security policies to protect critical assets from cyber threats.

VPN Vulnerability Management Security Policies Patch Management

Network & Security Senior Engineer

HE Space Operations GmbH

Jul 2014 - Jul 2022 (8 years)

As a contractor for EUMETSAT, I manage data networking and security systems, define networking needs for satellite programs, and ensure security considerations are integrated into network evolutions.

Capacity Planning

Senior Network and Security Engineer

Turkish Telecom

Jul 2013 - Jul 2014 (1 year)

At Turkish Telecom, I engineered data networking and security solutions, focusing on designing a new data center network and security infrastructure to support millions of customers.

Data Center Network Design HLD LLD Creation Implementation

Network Design and Engineering Specialist

HSBC Bank

Jul 2010 - Jul 2013 (2 years 11 months)

As a Network Design and Engineering Specialist at HSBC Bank, I engineered data networking projects, implemented services, and represented the network team in IT operations meetings.

Implementation Documentation