Lead Security Engineer

The Lead Security Engineer provides hands-on technical leadership for American Oncology Network’s enterprise security program, overseeing security tools, configurations, monitoring, vulnerability management, incident response, and managed security service partners across a distributed healthcare environment. Reporting to the Director of IT Security, this role leads and develops a team of three security staff, strengthens the protection of patient information and clinical operations, and drives consistent security practices across AON locations. Key Performance Areas

KPA 1: Security Engineering, Tools and Infrastructure

• Own and administer the security technology stack, including SIEM/SOAR, endpoint protection, email security, privileged access management, and secure network access.

• Maintain and optimize Rapid7 InsightIDR, InsightVM and InsightConnect, Bitdefender GravityZone, Mimecast, Delinea Secret Server, and Cato security configurations and coverage.

• Secure Microsoft 365, Azure and other cloud/SaaS environments by establishing configuration baselines and monitoring security posture.

• Manage security tool licensing, coverage, and renewal inputs to maintain appropriate protection and cost-effective utilization.

KPA 2: Threat Detection, Incident Response and Vulnerability Management

• Lead security event triage and incident investigations in partnership with the managed detection and response provider; coordinate containment, recovery, and post-incident reviews.

• Oversee vulnerability scanning, prioritization, remediation, and patch management across endpoints, servers, cloud platforms, and network infrastructure.

• Document risks associated with legacy systems and validate compensating controls where timely remediation is not feasible.

• Develop response runbooks, technical standards, and repeatable procedures to support consistent security operations.

KPA 3: Identity, Access and Security Risk Compliance

• Strengthen identity and access security through multifactor authentication, conditional access, privileged access management, joiner/mover/leaver controls, and periodic access reviews.

• Coordinate annual HIPAA- and NIST-aligned security risk assessments, vulnerability assessments, and penetration tests with external assessment partners.

• Track and drive remediation of assessment findings and security gaps, communicating technical risks and priorities to stakeholders.

• Assess security risks arising from third-party vendors, integrations, newly onboarded sites, and acquired practices.

KPA 4: Vendor and Managed Security Partner Oversight

• Serve as the technical lead and primary day-to-day accountability point for managed service and security partners, including ATG and Rapid7 MDR.

• Validate provider deliverables, service quality, investigation work, and adherence to contractual service-level agreements.

• Escalate gaps and coordinate corrective action with internal IT stakeholders and external partners.

• Promote clear documentation, ownership, and communication across security operations and partner workflows.

KPA 5: Team Leadership and Operational Improvement

• Lead, mentor, and develop security staff by establishing priorities, reviewing deliverable quality, and building technical capabilities.

• Provide practical guidance during complex security investigations, remediation activities, and operational issues.

• Identify opportunities to improve security workflows through PowerShell, Python, and other scripting or automation methods., The essential functions described herein are intended to define the fundamental duties of the position and serve as the minimum requirements for performance. They do not represent an exhaustive list of all job duties that may be required. AON complies with the Americans with Disabilities Act (ADA) and applicable state and local laws. The Company will engage in an interactive process to evaluate and, where appropriate, provide reasonable accommodations to qualified individuals with disabilities, provided such accommodations do not impose an undue hardship on the business.

• Bachelor’s degree in information security, Computer Science or related field preferred.

Minimum Relevant Experience

• 8+ years of information security or security engineering experience, including hands-on operation of production security tools.

• 2+ years leading or mentoring security staff.

• Experience overseeing MSP, MSSP, or MDR providers; leading security investigations; and administering SIEM/XDR and vulnerability management technologies.

• Knowledge of HIPAA, HITECH, and healthcare security frameworks (HITRUST, NIST CSF).

• Practical experience with endpoint, email, network, cloud, and privileged access security, including Microsoft 365, Azure, Entra ID, Rapid7 InsightIDR and InsightVM.

• Preferred: Healthcare or multisite provider experience, EHR familiarity (e.g., OncoEMR), and M&A or new-site security integration.

Certifications/Licenses

• Preferred: CISSP, GIAC (GCIH, GCIA, GSEC), CCSP, or Microsoft security certifications.

Skills

• Security Engineering

• Incident Response

• Vulnerability Management

• Identity and Access Management

• Cloud Security

• Vendor Oversight

• Security Compliance

• Team Leadership

• Scripting and Automation (PowerShell/Python)

• Technical Risk Communication, * Sitting

• Keyboard use

• Minimal lifting

• Long screen exposure

Cognitive Requirements

• Time management

• Effective written/verbal communication

• Policy interpretation

Environmental Requirements

• Home office setup

• Minimal external environmental exposure

Accommodation Notes

• Flexible hours

• Ergonomic home office guidance

• Communication software accessibility