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Mechanicus LLC is a managed service provider with a security-forward practice — Microsoft Sentinel, Blackpoint MDR, and a real SOC workflow rather than a "we forward alerts to a third party" arrangement. Roughly a quarter of our monthly ticket volume is security work: targeted phishing investigations, malicious login attempts, SIEM triage, and MDR collaboration. We need a senior engineer who can own that work end-to-end. 

We’re looking for a Infrastructure & Security Engineer who will serve as the senior technical escalation point for complex infrastructure, cloud, and security issues across client environments.  

You'll be the person Tier 2 calls when the impossible-travel alert turns out to be real, when the AVD environment needs re-architecting, when a client's M365 tenant has been compromised at 2am. You'll also drive the proactive work — hardening, detection engineering, post-incident reviews — that keeps the volume from getting worse. 

We don't expect you to be in the office. We do expect you to be reachable during a P1. 

What You’ll Be Doing 

Security Operations & Incident Response 

• Investigate phishing attacks, suspicious login activity, and account compromise incidents 

• Perform threat hunting, log analysis, containment, and remediation 

• Lead response efforts for Microsoft 365 and Azure-related security events 

• Collaborate with security partners and vendors during active incidents 

• Conduct post-incident reviews and improve prevention strategies 

Microsoft 365 & Identity Security 

• Design and improve Conditional Access policies and identity security controls 

• Manage and optimize Microsoft Defender and Entra ID security features 

• Implement security baselines and hardening standards across client environments 

• Improve MFA, privileged access, and identity governance workflows 

Cloud & Infrastructure Engineering 

• Support and troubleshoot Azure infrastructure and Azure Virtual Desktop environments 

• Handle complex escalations involving networking, virtualization, storage, and authentication 

• Lead migrations involving Microsoft 365, Azure, servers, and cloud infrastructure 

• Assist with automation and infrastructure-as-code initiatives 

Technical Leadership 

• Serve as the Tier 3 escalation point for advanced technical issues 

• Mentor junior engineers and contribute to technical standards 

• Create documentation, operational runbooks, and repeatable processes 

• Identify recurring problems and build long-term solutions 

What We’re Looking For 

• 5+ years of progressive IT experience, with at least 2 years focused on security operations (SOC analyst, security engineer, or senior engineer at a security-focused MSP). 

• Strong Microsoft 365 security stack experience: Defender for Office 365, Defender for Endpoint, Defender for Identity, Entra ID Protection, Conditional Access at scale. 

• Solid Azure fundamentals — Entra ID, AVD, networking (VNets, NSGs, Private Endpoints), RBAC, and at least familiarity with IaC (Bicep or Terraform). 

• Incident response experience — you've worked a real BEC, a real ransomware incident, or a real account takeover end-to-end and can talk through the timeline, the decisions, and what you'd do differently. 

• PowerShell at a functional scripting level — able to automate administrative tasks, work with Microsoft 365/Azure modules, and troubleshoot or modify existing scripts.

• Excellent written communication — incident reports, RCA documents, client-facing summaries that don't make a non-technical CFO panic. 

Nice To Have 

• Certifications: SC-200, SC-300, AZ-500 (mapped directly to our Microsoft Sentinel / Entra ID / Azure security work) 
• Operational experience with Blackpoint Cyber MDR — incident handoff, isolation decisions, post-incident workflow with their SOC. 
• Hands-on with our full operational stack: 
  • HaloPSA (PSA/ticketing)
  • NinjaOne / NinjaRMM (RMM) 
  • CIPP (M365 multi-tenant admin) 
  • Hudu (documentation) 
• Barracuda Email Protection policy management and incident response (BEC, mass-quarantine events).
• Experience designing CIS or NIST CSF-aligned baselines for SMB clients running Microsoft 365 and Azure.

HR Information: 

• Full-time, permanent role 
• Remote flexibility for candidates in the East Coast or Central US only
• Salary: $80,000 – $110,000 depending on experience and certifications 
  • Annual performance bonus tied to security KPIs (mean time to detect, mean time to contain, recurring-incident reduction)
• Health insurance
• Simple IRA 
• 12 days PTO to start (accrual increases with tenure) + 8 paid holidays
• Schedule: Mondays-Fridays, 8 AM – 5PM 
• Home office stipend