Security Administrator

The Phoenix Group; New York (NY); On-site; USD 120,000 - 180,000; Full time

Job summary

The Phoenix Group seeks a senior technologist to manage and enhance a predominantly Microsoft-based environment across identity, security, and infrastructure. You will collaborate with stakeholders and external providers to strengthen security controls, automation, and operational resilience.

Responsibilities include maintaining Entra ID, M365, Intune, Defender, Exchange Online, and Graph-based automation, while driving vulnerability remediation, incident response, and disaster recovery planning

Qualifications

• 7+ years in systems administration or infrastructure.
• Senior-level production environment experience.
• Hands-on with Microsoft stack (Entra ID, M365, Intune, Defender, Exchange Online).
• Strong networking and security fundamentals.
• Experience with endpoint security, patching, incident response, and hardening.
• Strong PowerShell skills and automation.
• Experience in security-conscious environments.
• Excellent communication and collaboration.

Responsibilities

• Administer Microsoft cloud infrastructure, endpoints, identity platforms, and related enterprise systems.
• Own identity and access management, including Entra ID, MFA, SSO, Conditional Access, privileged access, and user lifecycle processes.
• Manage Microsoft 365 environment including Exchange, SharePoint, Teams, OneDrive, and security/compliance functionality.
• Administer endpoint configuration and management through Microsoft Intune and related tooling.
• Maintain network and connectivity infrastructure, including firewalls, VPN, wireless, segmentation, and related security controls.
• Monitor endpoint and security technologies and investigate threats, vulnerabilities, and suspicious activity.
• Work with internal stakeholders and third-party security resources on incident investigation, containment, remediation, and recovery.
• Oversee patching, vulnerability remediation, endpoint hardening, and ongoing security improvements.
• Assist with infrastructure upgrades, system changes, configuration management, and technology implementations.
• Maintain backup and recovery processes and participate in disaster recovery and business continuity testing.
• Maintain technology asset records, licensing information, system documentation, and operational procedures.
• Assist with internal and external security assessments, audits, and compliance initiatives.
• Develop scripts and automations using PowerShell and Microsoft Graph to improve system administration and reduce manual processes.
• Help evaluate and implement security controls around emerging technologies, including AI-enabled tools and platforms.
• Create and maintain technical documentation, procedures, runbooks, and troubleshooting resources.
• Work closely with leadership and other technical stakeholders to identify infrastructure and security improvements.

Skills

PowerShell

Entra ID

Microsoft 365

Intune

Defender

Exchange Online

Networking

Incident response

Automation

Microsoft Graph

Tools

Microsoft Graph

Job description

This is an opportunity for a senior-level technologist who enjoys being close to the technology rather than operating strictly at an architectural or managerial level. The role will have visibility across infrastructure, identity, endpoint security, networking, automation, compliance, and emerging technology.

The Role

You will be responsible for maintaining and improving a predominantly Microsoft-based technology environment while partnering with internal stakeholders and outside technology/security providers.

Responsibilities will include:

• Administer and maintain Microsoft cloud infrastructure, endpoints, identity platforms, and related enterprise systems.
• Own identity and access management, including Entra ID, MFA, SSO, Conditional Access, privileged access, and user lifecycle processes.
• Manage the organization's Microsoft 365 environment, including Exchange, SharePoint, Teams, OneDrive, and security/compliance functionality.
• Administer endpoint configuration and management through Microsoft Intune and related tooling.
• Maintain network and connectivity infrastructure, including firewalls, VPN, wireless, segmentation, and related security controls.
• Monitor endpoint and security technologies and investigate potential threats, vulnerabilities, and suspicious activity.
• Work with internal stakeholders and third-party security resources on incident investigation, containment, remediation, and recovery.
• Oversee patching, vulnerability remediation, endpoint hardening, and ongoing security improvements.
• Assist with infrastructure upgrades, system changes, configuration management, and technology implementations.
• Maintain backup and recovery processes and participate in disaster recovery and business continuity testing.
• Maintain technology asset records, licensing information, system documentation, and operational procedures.
• Assist with internal and external security assessments, audits, and compliance initiatives.
• Develop scripts and automations using PowerShell and Microsoft Graph to improve system administration and reduce manual processes.
• Help evaluate and implement security controls around emerging technologies, including AI-enabled tools and platforms.
• Create and maintain technical documentation, procedures, runbooks, and troubleshooting resources.
• Work closely with leadership and other technical stakeholders to identify infrastructure and security improvements.

What We're Looking For

• 7+ years of experience in systems administration, infrastructure, or a closely related discipline.
• Several years of experience operating in a senior-level production environment.
• Strong hands-on experience with the Microsoft technology stack, particularly Entra ID, Microsoft 365, Intune, Defender, and Exchange Online.
• Solid understanding of enterprise networking and security fundamentals.
• Experience with endpoint security, vulnerability management, patching, incident response, and system hardening.
• Strong PowerShell skills and experience automating administrative tasks.
• Experience working in an organization where security, confidentiality, and data protection are important.
• Strong troubleshooting and problem-solving abilities.
• Excellent written and verbal communication skills.
• Ability to work independently, take ownership of projects, and operate comfortably in a fast-moving environment.
• Strong attention to detail and a practical approach to security and infrastructure management.

Preferred Background

• Experience in a professional services, financial services, technology, legal, consulting, or similarly security-sensitive environment.
• Exposure to formal security frameworks or audit programs such as ISO 27001, SOC 2, NIST, or similar standards.
• Experience with Microsoft security certifications or industry certifications such as CISSP, CISM, GIAC, or related credentials.
• Experience supporting third-party security providers or managed SOC environments.
• Familiarity with cloud automation and Microsoft Graph.
• Experience helping organizations establish security practices around AI and other emerging technologies.

Technology Environment

Infrastructure: Windows, cloud infrastructure, endpoints, networking, VPN, firewalls, wireless

Security: EDR, vulnerability management, DLP, incident response, security monitoring

Other: Backup & Disaster Recovery, Asset Management, Security Compliance, AI Technologies