Senior Manager Information Security (Red team lead)

Celestica • Richardson, TX

19h • Onsite

About The Position

The Senior Manager, Information Security is responsible for proactively identifying, testing, and mitigating security gaps within the organization’s digital estate. Unlike a traditional SOC analyst who reacts to alerts, this role is offensive and architectural in nature. You will rigorously review security policies and architecture, continuously test the effectiveness of cybersecurity controls through simulation and validation exercises, and drive the remediation of identified weaknesses. The ideal candidate combines the mindset of an attacker with the discipline of an auditor to ensure the organization's defenses remain resilient against evolving threats.

Requirements

• 8–10 years of hands-on experience in cybersecurity, with a specific focus on penetration testing, threat hunting, or security architecture.
• Proven experience in reviewing and auditing security policies and technical architectures for enterprise environments.
• Experience with Breach and Attack Simulation (BAS) tools (e.g., AttackIQ, Cymulate) or manual emulation frameworks (e.g., Atomic Red Team, MITRE CALDERA).
• Deep understanding of the MITRE ATT&CK framework and how to map specific controls to adversary tactics.
• Proficiency in scripting languages (Python, PowerShell, Bash) for automating hunts and validation tests.
• Strong knowledge of operating system internals (Windows, Linux) and network protocols (TCP/IP, DNS, HTTP/S).
• Familiarity with security control platforms (SIEM, EDR, IDS/IPS, Firewalls) and how to bypass or test them.
• Analytical Thinking: Ability to look at a complex system and identify the weakest link.
• Communication: Ability to explain complex technical exploitation paths to non-technical stakeholders (e.g., explaining why a policy gap matters).
• Integrity: Unwavering ethical standards when conducting offensive operations against internal live systems.
• Bachelor’s degree in Computer Science, Cybersecurity, Information Systems, or equivalent experience.
• Mandatory Offensive Security Certification: Must hold at least one advanced certification such as OSCP (Offensive Security Certified Professional), GPEN (GIAC Penetration Tester), CEH (Certified Ethical Hacker) Practical, or CompTIA PenTest+.

Nice To Haves

• Additional certifications in security architecture (e.g., CISSP, CISM) or cloud security (e.g., CCSP, AWS Security Specialty) are highly desirable.

Responsibilities

• Security Policy & Architecture Review Review organizational security policies, standards, and procedures and analyze the existing cybersecurity architecture (network, cloud, endpoint, and application) to identify design flaws, misconfigurations, or logic gaps that could be exploited by insiders or external attackers. Collaborate with security architects and engineering teams to recommend structural improvements that reduce the attack surface.
• Continuous Control Validation (CCV) & Threat Hunting Design and execute continuous control validation programs to test the efficacy of security tools (e.g., EDR, SIEM, Firewalls, DLP). Perform proactive "purple team" exercises and threat hunts to identify silent failures in detection logic or blocking mechanisms. Simulate real-world attack scenarios (e.g., lateral movement, data exfiltration, privilege escalation) to validate if existing controls trigger appropriate alerts and blocks.
• Gap Analysis & Mitigation Translate findings from architecture reviews and validation tests into actionable remediation plans. Work cross-functionally with IT, DevOps, and GRC teams to close identified security gaps, ensuring that "quick fixes" do not introduce new risks. Track and report on the "Time to Detect" and "Time to Remediate" metrics to demonstrate continuous improvement in the organization’s defensive posture.
• Offensive Security Leadership Serve as the internal subject matter expert on offensive security techniques, tactics, and procedures (TTPs). Stay ahead of the latest threat intelligence and vulnerability disclosures to predict how they might impact the organization’s specific architecture. Mentor junior analysts on threat hunting methodologies and offensive security mindset.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level