Senior Security Specialist

3 months ago

Thames Valley, United Kingdom GCS Recruitment Specialists Ltd Full time

I am currently seeking a Senior Security Specialist to join a dynamic team at a leading provider of converged broadband, video, and mobile communication services. This company is at the forefront of the digital revolution, connecting 85 million subscribers across Europe and the United Kingdom through their advanced fibre and 5G network infrastructure.

As a Senior Security Specialist, you will play a critical role in maturing the organization's approach to managing and responding to operational security incidents in our ever-evolving business landscape. Your deep technical expertise and passion for investigating and handling cyber incidents will be instrumental in supporting the entire portfolio of their company, detecting, responding, remediating, and recovering from cyber-attacks. You will also proactively defend against threats through Intelligence Led Threat Hunting.

Joining the Group Security division, you will collaborate closely with front-line technical teams, delivering an end-to-end intelligence-led proactive monitoring, detection, and response cyber security capability to our company, its Operating Companies, and Joint Ventures.

Note: This position primarily requires Monday to Friday office hours, with occasional out-of-hours support.

**Responsibilities**:

- Act as a Security Subject Matter Expert (SME) and provide guidance, leadership, and inspiration to the security analysts team, fostering their skills development.
- Drive the technical skill set of the team by developing threat hunting, adversary emulation, and leading-edge threat mitigation methodologies and security use cases.
- Demonstrate a comprehensive understanding of complex IT environments, including networking, system administration, and database platforms, developing defensive methodologies against potential attack vectors.
- Analyze a wide range of log sources, normalize data, and leverage analytical platforms to query and extract valuable insights.
- Identify malware types, infection methods, and extraction of Indicators of Compromise (IoCs) and Tactics, Techniques, and Procedures (TTPs).
- Collaborate on investigations and respond to security incidents, demonstrating ownership, responsibility, and timely resolution.
- Work effectively within a team, guiding and making confident decisions.

**Key Accountabilities**:

- Serve as a Cyber Security Subject Matter Expert (SME) within our company and associated brands.
- Proactively enhance technical capabilities in detecting, responding to, and mitigating cyber-attacks and related security issues.
- Provide technical expertise in assessing the scope of a cyber-attack, determining business impacts, and advising on containment measures, system hardening, and mitigation strategies to prevent future incidents.
- Collaborate with Incident Managers and Incident Commanders, offering technical direction and leadership during major incidents.
- Engage, educate, and collaborate effectively with business and technology teams on technical cyber security topics.
- Prepare technical and management reports to demonstrate the effectiveness and value of the team's work.

**Requirements**:

- Minimum of 5 - 8 years of experience managing, investigating, and responding to cyber incidents.
- Deep knowledge and understanding of coordinating cross-organizational responses to security incidents.
- In-depth knowledge of technical security systems, architecture, technology, penetration testing, and Security Event Management methodologies.
- Proficiency in Splunk queries, dashboards, use case creation, and Enterprise Security.
- Familiarity with Cyber Security Methodologies, including the Cyber Kill Chain, Mitre ATT&CK Framework, NIST, and MITRE Def3nd.
- Ability to identify patterns and trends in data, conduct incident root cause analysis, and contribute to future prevention strategies.
- Experience with security technologies and defences such as Firewalls, Snort, Bro, Intrusion Detection Systems (IDS), TCP/IP Networking, WireShark, TCPDump, and Netflow analysis.
- Strong understanding of IT systems and technologies, including Linux and Windows operating systems, E-Mail, Proxies, and Endpoint Protection.
- Working knowledge

GCS Computer Recruitment Services is acting as an Employment Agency in relation to this vacancy.

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