Security Analyst, MXDR

Cybersecurity for the public good.

At nuHarbor, we help organizations navigate an increasingly complex cybersecurity landscape with confidence. By combining expert guidance, innovative technology, and trusted partnerships, we make security stronger, more effective, and easier to understand. We're looking for talented individuals who are passionate about solving meaningful challenges, helping clients succeed, and continuously improving alongside a team that values curiosity, collaboration, and impact.

The Opportunity

The Security Analyst, XXDR, is a core member of nuHarbor’s MXDR delivery team, responsible for the full-lifecycle triage, investigation, and disposition of security alerts and incidents across our supported XXDR environments. The Analyst drives each case to a defensible, evidence-based disposition, escalating per defined criteria and documenting findings clearly enough for the next person in the chain to act on. This is not a passive alert-monitoring role: it demands sound investigative judgement under time pressure, disciplined documentation, and good calibration on when to escalate versus resolve.

This role operates within a 24x7 service delivery model, where high severity incidents require rapid response at any time and analysts are expected to manage a dynamic queue of concurrent alerts across multiple client environments while meeting defined response time objectives.

Shift

Monday - Friday, 3:30pm - 12:00 ET

What Success Looks Like 

In this role, you will focus on: 

• Security Monitoring & Investigation
  • Review, analyze and investigate security alerts and incidents in Microsoft Defender and Sentinel environments.
  • Identify and assess indicators of compromise (IOC) and attack (IOA) across client environments
  • Drive incidents through full lifecycle: triage -> investigation -> disposition -> escalation or closure
  • Accurately triage and classify alerts, minimizing false positives while preserving visibility into real threats and document outcomes to support continuous improvement and quality review.
• Incident Response & Escalation
  • Execute incident response procedures aligned to defined playbooks and client escalation plans
  • Escalate incidents that meet client escalation criteria with documented evidence, impacted entities, and investigation summary.
  • Support containment actions (e.g., isolate endpoints, kill processes) when access allows
  • Partner with client SOC or IT teams when additional enrichment or remediation is required
  • Actively balance accuracy vs. urgency in escalation decisions
• SLO Operations
  • Meet defined SLOs for alert triage start, investigation updates, and case closure, with elevated response standards for high-severity and 24x7 priority incidents.
  • Prioritize and respond to high severity incidents during second shift, in alignment with 24x7 response requirements and defined SLOs. Reprioritize and update investigations when incident severity changes, ensuring timely escalation and accurate documentation
• Detection Tuning & Continuous Improvement
  • Evaluate alert quality and recommend tuning or suppression of non-actionable detections
  • Review and improve analytics rules, queries, and detection logic
  • Identify gaps in visibility, logging, or detection coverage
  • Contribute to development of playbooks, automation, and operational processes
• Client Communication & Reporting
  • Document all investigations, findings, and actions in service desk systems
  • Provide timely updates through ticketing platforms and escalation channels
  • Support regular reporting on: Incident trends, Environment health, Open cases and outcomes
  • Participate in client calls, reviews, and quarterly business reviews as needed
• Autonomy & Ownership
  • Operate independently in a fast-paced environment, managing multiple investigations simultaneously
  • Make informed decisions with incomplete data and limited client context
  • Proactively identify risks, gaps, and opportunities for improvement
  • Take ownership of your queue, your clients, and the quality of your work

Your Foundation

We're looking for someone who brings these minimum qualifications:

• Bachelor’s Degree and two (2) years of experience in cybersecurity, SOC, MDR or incident response.
  • In lieu of a degree, two (2) years of experience in a related technology field and relevant industry certifications are required.
• Demonstrated experience with SIEM solutions, SOC operations, executing security event triaging and tuning.
• Experience working in SIEM/XDR tools including specifically Microsoft Sentinel or Defender.
• Proven ability to independently investigate and triage security events.
• Experience with security event analysis, log correlation, and threat detection.
• Experience with KQL or similar query languages.
• Familiarity with common endpoint security concepts.
• Demonstrated knowledge of security log, infrastructure design and networking fundamentals.
• Understanding of Identity and Access threats.
• Strong investigative mindset with attention to detail.
• Ability to anticipate problems, communicate them, and resolve appropriately.
• Demonstrated verbal and written communication skills for various internal and external audiences.
• Must be a citizen of the United States.

Stand out With

You may stand out if you have experience with:

• Bachelor’s Degree and five (5) or more years in the Information Technology field.
• Holds relevant industry certifications
  • CompTIA Security+, CySA+, CISSP, etc.
  • Microsoft Security Operations Analyst (SC-200)
  • Azure Security Engineer (AZ-500)
• Proven experience in a MSSP or multi-client environment
• Ability to conduct multi-step breach and investigative analysis to trace dynamic activities associated with advanced threats.
• Exhibit advanced understanding of, and ability to communicate, security technologies that can be used to mitigate cyber risks.
• Strong understanding of Incident Response phases and demonstrated experience responding to security incidents.
• Attention to detail and a methodical approach to standard operating procedures.
• Ability to explain simple hardening methods for network and process detections.
• Ability to manage multiple concurrent objectives or activities and effectively make judgments.
• Understanding of common network services and attacks against them.

Why nuHarbor?

At nuHarbor, you'll find more than a job - you'll find a team committed to helping each other grow, solve meaningful problems, and make a measurable impact.

You can expect:

• A collaborative, high-performing team environment
• Leaders who are invested in your success and development
• Meaningful work that helps organizations protect critical services and missions
• The encouragement to bring your authentic self to work every day
• Competitive pay, performance-based bonus opportunities, generous paid time off, and comprehensive benefits

Compensation

This position has an anticipated base salary range of $90,000–$116,000 annually and is eligible for a shift premium. Plus, this position is eligible for nuHarbor's annual bonus program with a target opportunity of 10%.

Actual compensation is based on factors including experience, skills, certifications, and geographic location.

Join Us

At nuHarbor, we believe great security starts with great people. We're looking for curious problem-solvers, trusted advisors, and continuous learners who are passionate about helping clients win.

If you're ready to make an impact while growing alongside a team that values people as much as technology, we'd love to hear from you.

 

AAP/EEO Statement

The Equal Employment Opportunity Policy of nuHarbor is to provide a fair and equal employment opportunity for all associates and job applicants regardless of race, color, religion, national origin, gender, sexual orientation, age, marital status or disability. nuHarbor hires and promotes individuals solely based on their qualifications for the job to be filled.

nuHarbor believes that employees should be provided with a working environment which enables each associate to be productive and to work to the best of his or her ability. We do not condone or tolerate an atmosphere of intimidation or harassment based on race, color, religion, national origin, gender, sexual orientation, age, marital status, or disability.  We expect and require the cooperation of all employees in maintaining a discrimination and harassment-free atmosphere.

Bachelor's degree plus 2 years in cybersecurity, SOC, MDR, or incident response, or equivalent technology experience with certifications. Requires SIEM/XDR, Microsoft Sentinel or Defender, KQL, investigation, networking, and communication skills.

Key Responsibilities

• investigating alerts
• responding incidents
• tuning detections

Skills & Tools

Microsoft Defender, Microsoft Sentinel, SIEM, XDR, KQL

Job Details

• Category: Information Technology
• Seniority: Entry Level
• Commitment: Full Time
• Workplace: Remote — Colchester, Vermont, United States
• Salary: USD 90,000 – 116,000 / year
• Languages: English

Benefits

• Generous paid time off

About nuHarbor

A cybersecurity provider helping organizations protect critical services through expert guidance, technology, and trusted partnerships. — Industry: Information Technology