Security Engineer

MNS Group is a cybersecurity-focused IT Partner providing MSP, MSSP, and Compliance Services. Our security guidance and deep federal experience help government contractors solve critical network security and compliance issues to win contracts and secure our nation.

The Security Engineer is responsible for implementing, maintaining, and improving security controls across client environments as well as maintaining internal MSG infrastructure. This role supports incident response, endpoint security, Microsoft 365 security configuration, vulnerability remediation, and compliance execution (ex: NIST / CMMC readiness).

This position requires strong technical ownership, sound judgment, and the ability to operate independently across multiple client environments and MNS internal infrastructure. The Security Engineer is expected to take responsibility for issues through resolution, maintain clear and accurate documentation, communicate effectively with technical and non-technical stakeholders, and consistently apply established security standards and best practices. This role requires the ability to prioritize competing demands, identify and escalate risk appropriately, and contribute to the continued improvement and standardization of MNS security processes, tooling, and client security baselines.

• Monitor and respond to security alerts across endpoint, email, identity, and cloud platforms
• Triage and investigate suspicious activity (phishing, malware, lateral movement indicators, unauthorized access attempts)
• Perform containment actions (isolation, credential resets, policy changes, IOC blocking)
• Coordinate escalation and communication with internal leadership and clients as needed
• Participate in post-incident reviews and recommend improvements

• Ensure endpoints meet baseline security standards (patching, encryption, AV/EDR coverage, least privilege), both for clients and internal MSG standards
• Support remediation of malware and persistent threats
• Manage and enforce device compliance policies through Intune (where applicable)

• Configure and support Microsoft Defender security controls (Defender for Endpoint, Defender for Office, etc.)
• Support M365 identity protection: MFA, Conditional Access, SSO integrations, risky sign-in remediation
• Secure Exchange Online (anti-phishing policies, mail flow rules, quarantine management)
• Support secure SharePoint/OneDrive access controls and external sharing governance
• Assist with secure tenant configurations and security posture improvements

• Run or support vulnerability scans and interpret results
• Prioritize remediation based on risk and business impact
• Coordinate patching and configuration changes with IT and client stakeholders
• Validate remediation actions and document outcomes

• Support client security initiatives aligned to frameworks such as NIST 800-171 / CMMC, as it relates to GovCon Managed Services
• Maintain security-related documentation
• Help standardize baseline security controls across environments

• Create and maintain SOPs, security runbooks, and client security documentation in ITGlue
• Maintain accurate ticket notes, investigation details, and remediation steps
• Identify repeat security issues and propose standard improvements
• Improve internal consistency for security baselines, tool usage, and escalation procedures

• 4–6 years of technical IT experience, including 2+ years of security experience.
• Strong troubleshooting ability across:
• • Windows endpoints and common security failure modes
  • Identity and authentication issues, including MFA, Conditional Access, and account compromise
  • Microsoft 365 security configurations
• Working knowledge of:
• • TCP/IP, DNS, VPNs, and firewall concepts
  • Common attack vectors, including phishing, credential theft, and ransomware
  • Endpoint hardening and patch management best practices
• Experience supporting:
• • Microsoft Defender suite
  • Microsoft Entra ID administration and security controls
  • Log analysis, security alert triage, and investigation
• Familiarity with NIST SP 800-171 and CMMC requirements.
• Experience with SIEM platforms, PowerShell or another scripting language, vulnerability management, incident response, and security-control implementation preferred.
• Bachelor’s degree in cybersecurity, information technology, computer science, or a related field, or equivalent professional experience.
• CompTIA Security+ certification required; additional security certifications such as CompTIA CySA+ or Microsoft Certified: Security Operations Analyst Associate (SC-200) preferred.

Well, for one, we care about you as a professional and a person. You will join a team of driven, compassionate, friendly experts and visionary leaders who enjoy a challenge. Are you driven to do better every day? Same. We have your back by offering:

·       Competitive salary

·       Medical, dental, and vision insurance, with HSA Health Insurance option

·       Reimbursement for training and pursuit of advanced certifications.

·       Company match on voluntary pretax salary contributions

·       12 paid holidays

·       15 days of Paid Time Off (PTO)

·       100% paid group life insurance

·       100% company-paid short-term disability

·       100% company-paid long-term disability

· Free-to-you on-campus gym