Cybersecurity Engineer ( W2 direct hire, no C2C )

System One; Alpharetta (GA); On-site; USD 110,000 - 150,000; Full time

Job summary

System One is seeking a Cybersecurity Engineer to secure enterprise infrastructure, respond to threats, and administer Microsoft 365 security tools in a direct-hire role in our IT department.

The role involves implementing security controls across cloud and on‑prem environments, managing SIEM and logging, and leading security incident response and user awareness training.

Qualifications

• Experience implementing security controls from scratch with best practices.

Responsibilities

• Secure enterprise infrastructure and respond to cyber threats.

Skills

Security engineering

Microsoft 365 security

Firewalls & VPNs

EDR

Email security

Vulnerability management

Windows Server

Hybrid AD

Cybersecurity frameworks

Compliance standards

Tools

Microsoft Defender

Entra ID (Azure AD)

Conditional Access

Intune

Purview

Exchange Online Protection

SIEM

Job description

*** This is a direct hire role ( W2 salaried, permanent, full-time position ) in our own IT department

*** NO C2C candidates, NO 3rd parties, NO visa sponsorship available, NO green card sponsorship available, NO candidates with temporary work authorizations of any kind

Cybersecurity Engineer :

• This role is responsible for securing enterprise infrastructure, responding to cyber threats, administering Microsoft 365 security, and helping ensure compliance with applicable regulatory requirements.
• Implement, and maintain enterprise security controls across cloud and on-premises environments.
• Manage security compliance and assist in security policy creation
• Monitor and respond to security alerts, incidents, phishing attempts, malware, and suspicious activity.
• Perform vulnerability assessments, remediation tracking, and security hardening.
• Manage endpoint protection systems, email security, MFA, Conditional Access, and identity security controls.
• Configure and maintain SIEM, logging, and monitoring platforms.
• Conduct threat hunting and proactive security reviews.
• Microsoft 365 and Cloud Security : Administer Microsoft 365 security tools including Microsoft Defender , Entra ID (Azure AD) , Conditional Access, Intune, Purview, Exchange Online Protection
• Implement DLP, retention, and email security policies.
• Secure remote access, mobile devices, and hybrid cloud infrastructure.
• Secure Firewalls, VPNs, wireless networks, switches, and servers.
• Review Firewall rules and network segmentation.
• Support backup, disaster recovery, and business continuity initiatives.
• Assist with patch management and secure configuration baselines.
• Provide escalation support for security-related help desk issues.
• Lead response efforts during security incidents and outages.
• Conduct user security awareness training and phishing simulations.

Required Qualifications :

• Experience implementing security controls and solutions from scratch - not just maintaining or monitoring established systems - with a working knowledge of security best practices and the ability to determine what to implement and how to execute it effectively.
• At least 5+ years of hands-on IT security / cybersecurity engineering experience.
• Strong experience with Microsoft 365 security technologies specifically.
• Experience with: Firewalls and VPN technologies, Endpoint Detection & Response (EDR), Email security platforms, Vulnerability management tools, Windows Server and Hybrid Active Directory, Knowledge of cybersecurity frameworks and compliance standards.

Preferred Qualifications :

• Certifications such as: CISSP, Security+ , SC-200, SC-300, AZ-500, CEH

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