Director of Offensive Security

NorthMark Strategies•Dallas, TX

13d

About The Position

The Director of Offensive Security reports directly to the CISO and owns continuous adversarial validation of the NMC² production environment. This is not a scheduled pentest function or a compliance-checkbox red team. You will build and run a standing offensive capability that operates against production with authorization, emulates named threat actors relevant to our customer base and infrastructure class, and produces independent, evidence-backed assessments of whether our controls work under realistic attack conditions. This function operates as an independent line of assurance within the Security organization, with a direct reporting relationship to the CISO. To preserve objectivity, assessment findings are delivered to the CISO without editorial review by the teams whose controls or systems are under evaluation. Security Engineering, Platform Engineering, and Security Architecture receive findings as remediation owners.

Requirements

15+ years in offensive security with demonstrated hands-on depth across at least three of: network penetration testing, red team operations, cloud penetration testing, application exploitation, hardware and firmware attack research, or advanced adversary emulation
5+ years leading offensive security teams, including direct accountability for hiring specialized offensive talent, managing operational security of red team infrastructure, and operating under formal rules of engagement against production systems
Demonstrated red team leadership against mature target environments: environments with functioning SOC, EDR, and IR capability, not greenfield pentest targets
Deep operational fluency with MITRE ATT&CK v15 and ATT&CK Navigator for coverage mapping, adversary emulation planning using frameworks such as MITRE CALDERA or Atomic Red Team, and purple team execution models
Hands-on capability with production-grade offensive tooling: C2 frameworks (Cobalt Strike, Mythic, Sliver, or equivalent), exploitation frameworks, custom tool development, and operational security for red team infrastructure
Strong command of cloud and container offensive tradecraft: Kubernetes attack paths, cloud IAM privilege escalation chains, service mesh and sidecar abuse, and multi-tenant isolation testing
Fluency with CWE, CVSS v3.1 and v4.0, OWASP Top 10, SANS CWE Top 25, and the CIS Controls v8 Penetration Testing domain (Control 18)
Experience integrating offensive findings into engineering workflow systems (Jira or equivalent) with enforceable SLA tracking, not report-and-walk-away engagements
Demonstrated ability to execute offensive work against production with appropriate authorization, blast radius control, and executive communication discipline
Exceptional written communication: findings must stand up to scrutiny from engineering leadership who will push back, and from auditors and customers who will consume the output

Nice To Haves

OSCP, OSEP, OSED, GXPN, GPEN, or CRTO certifications; CISSP alone is not sufficient evidence of hands-on offensive capability
Prior experience building an offensive security function from scratch, not inheriting an existing one
HPC, bare-metal, or hyperscale data center offensive assessment experience
Published CVE credits, conference talks (DEF CON, Black Hat, Offensive Con, Recon), or public offensive research
Background in threat intelligence consumption for adversary emulation planning (CTI-led red teaming)
Experience with sovereign cloud, export-controlled, or financial services customer environments

Responsibilities

Build and run a continuous red team program against the production NMC² environment: HPC clusters, multi-tenant Kubernetes, bare-metal provisioning infrastructure, customer network fabric, identity plane, and the internal control surface itself (SIEM, EDR, IAM, PAM)
Execute adversary emulation campaigns aligned to MITRE ATT&CK v15 TTPs relevant to our threat model: financially motivated access brokers (e.g., TTP sets associated with initial access brokers targeting financial services customers), APT groups with demonstrated interest in research computing and scientific workloads, and insider threat scenarios covering privileged operator abuse
Independently validate detection and response efficacy: every red team operation produces a detection coverage report measured against the SOC and IR functions, including time-to-detect, time-to-contain, and detection gap inventory by ATT&CK technique ID
Own the purple team feedback loop: every undetected TTP becomes a tracked detection engineering deliverable with owner and SLA, every detected-but- unresponded TTP becomes a tracked IR playbook deliverable
Run continuous attack surface validation against production, not just pre-production, with a documented rules-of-engagement framework, blast radius controls, and CISO-level authorization gates for destructive or high-risk techniques
Lead threat-led penetration testing of the HPC-specific attack surface: Slurm and workload manager abuse, GPU driver and firmware attack paths, InfiniBand and RDMA fabric isolation, scheduler privilege escalation, cross-tenant lateral movement in shared compute, and scientific software supply chain compromise
Own offensive validation of cloud and Kubernetes controls: IAM boundary testing, cross-account and cross-tenant escape attempts, container breakout chains, service mesh bypass, admission controller evasion, and secrets management integrity
Drive threat modeling at design stage for new platform capabilities and major architecture changes, producing adversarial design reviews that the CISO signs off on before build
Manage the external pentest and red team vendor portfolio: scoping, vendor selection, quality control of deliverables, and integration of external findings into the internal remediation tracking system
Build and maintain the offensive tooling stack including custom implants, C2 infrastructure, and internal exploit development capability, with clear controls on tool custody, source code management, and destruction protocols
Define and publish offensive security KPIs to CISO and board level: coverage against MITRE ATT&CK technique inventory, mean time to compromise from assumed-breach scenarios, control validation pass rate by control family, remediation velocity on P1 and P2 findings, and repeat finding rate
Issue formal assessment reports using CWE classification, CVSS v3.1 base and environmental scoring, and explicit exploitation evidence; findings are attestations, not suggestions
Champion an adversarial engineering culture across Platform and Security Engineering through documented attack patterns, regular internal briefings, and integration of offensive findings into developer tooling and CI/CD gates

Benefits

Company-Paid Lunch Stipend: Lunch is provided via GrubHub
100% Employer-Paid Medical in our High Deductible Health Plan, Dental and Vision benefits for employees and their families
16 weeks of Paid Parental Leave
Employee Assistance Program
Life insurance
Short-Term Disability and Long-Term Disability
Company will match 100% of your contributions up to 6% (401k)
Medical insurance in our PPO plan
Health Savings Accounts (with Company Contribution!)
Flexible Spending Accounts
Supplemental Life Insurance
Wellhub
25 days of Paid Time Off plus 12 company holidays