Grant Thornton Isle of Man · 5 hours ago
Cyber Defense Manager
Philadelphia, PA, United States
Full-time
Onsite
Senior Level
$144K/yr - $216K/yr
5+ years expGrant Thornton is a professional services firm that focuses on building trust and providing personalized business solutions. As a Cyber Defense Manager, you will lead cyber defense engagements, apply expert knowledge of threat detection strategies, and mentor analysts to enhance client cybersecurity programs.
Information Technology & Services
Responsibilities
Lead cyber defense engagements focused on adversary behaviors, detection coverage, and safeguard effectiveness across complex enterprise environments
Apply expert knowledge of MITRE ATT&CK to map threat scenarios, identify defensive gaps, and design measurable, threat-informed detection strategies
Engineer, tune, and validate detections across SIEM, EDR, NDR, and log-centric platforms to ensure high-fidelity coverage against real-world TTPs
Assess and strengthen network and system safeguards, including segmentation, hardening, logging architectures, and control configurations
Conduct threat-informed assessments, purple team exercises, and defensive readiness evaluations
Communicate defensive findings, tradeoffs, and recommendations clearly to both technical teams and executive stakeholders
Guide clients through building resilient defense programs, including detection maturity, operational readiness, and continuous improvement
Mentor analysts and contribute to the development of detection playbooks, methodologies, and defensive frameworks
Develop and manage client relationships with the intention to exceed client expectations
Adhere to the highest degree of professional standards and strict client confidentiality
Participate in professional development activities and training sessions on regular basis
Other duties as assigned
Qualification
Required
Bachelor's degree in Cybersecurity, Information Technology, Computer Science, or a related field is required
Minimum 5 years of related cybersecurity experience in a similar consulting practice or function
CISSP, CISM, GIAC (e.g., GSEC, GCIH, GISP, etc.), cloud security (e.g., AZ-500, AWS Certified Security, Google Cloud Professional Architect / Security Engineer) or other related certifications required
Strong command of MITRE ATT&CK and adversary tradecraft, with the ability to translate behaviors into actionable detections and safeguards
Deep experience with network defense, system hardening, logging pipelines, and security control implementation
Proven ability to articulate complex defensive issues to both technical and non-technical audiences with clarity and precision
Strong project management skills and the ability to manage multiple engagements and competing priorities in a rapidly growing, fast-paced, interactive, results-based team environment
Exceptional client service and communication skills, with a demonstrated ability to develop and maintain outstanding client relationships
Strong professional verbal and written skill
Leading and managing one or more of the overarching areas below: Assessing cybersecurity programs and capabilities against industry leading frameworks (e.g., NIST CSF, CRI Profile) and compliance and regulatory requirements
Working knowledge of cybersecurity industry leading practices and frameworks, such as NIST CSF, CRI Profile, ISO 27001/2, NYS DFS 500, PCI-DSS, CIS Controls, CIS Benchmarks
Excellent analytical, organizational and project management skills
Can travel as needed
Company
Grant Thornton Isle of Man
Grant Thornton Ireland and Grant Thornton Corporate Finance Limited (and their respective subsidiary/affiliate entities) are rapidly approaching a diverse workforce of 2,800 individuals across 8 locations on the island of Ireland, Isle of Man, Gibraltar, Bermuda, and USA.
1001-5000 employees
Funding
Current Stage
Late StageCompany data provided by crunchbase