Senior Security Analyst, RAAS | Managed Services

Aprio•Atlanta, GA

17d•$94,000 - $153,000

About The Position

Aprio is seeking a Senior Security Analyst to monitor, triage, and respond to threats across managed security clients using the Microsoft security stack. The analyst will serve as a first line of defense for multiple client environments, primarily using Microsoft Sentinel and Microsoft Defender XDR to detect, investigate, and contain threats. The role includes rotating after-hours and on-call coverage to support clients around the clock. Sentinel SOAR automation supports enrichment and first-response containment, allowing the analyst to focus on investigation and judgment. The analyst will deliver clear, client-ready incident communications and help improve detection and automation capabilities across a growing managed security practice. The role involves multi-tenant monitoring, incident investigation and response, automation and playbook oversight, client communications, continuous improvement, and participation in evening, weekend, holiday, and on-call coverage. Aprio describes opportunities to work with enterprise-grade Microsoft security tools across varied industries, contribute to detection engineering and automation, and grow within its managed security team. The role is offered with a stated salary range of $94,000–$153,000 per year. The application window is anticipated to close November 16, 2026, and may be extended.

Requirements

3–4 years of experience in a SOC, MSSP, MDR, or IT security operations role.
Hands-on production experience with Microsoft Sentinel and Microsoft Defender XDR.
Working knowledge of KQL.
Solid understanding of Microsoft Entra ID, Microsoft 365, Windows endpoints, networking fundamentals, and common attack techniques such as MITRE ATT&CK.
Clear written and verbal communication skills, including composure and clarity during active client incidents.
Availability and willingness to work evenings, weekends, holidays, and on-call rotations.
Ability to work independently with minimal supervision.
Working knowledge of Sentinel automation rules, incident tasks, and playbook triggers, including incident, alert, and entity triggers.
Sound judgment about when to trust automation and when to override it.
Microsoft SC-200 certification is required, plus at least one of SC-300, AZ-500, AZ-104, or SC-401, or commitment to earning one of them within 90 days of hire.

Nice To Haves

Experience managing multiple tenants simultaneously through Azure Lighthouse or Defender XDR multi-tenant management.
Experience building Sentinel automation with Logic Apps and using PowerShell or Python scripting.
Familiarity with Microsoft Security Copilot, Defender for Cloud, and Microsoft Purview.
SC-401 (Information Security Administrator) or SC-100 (Cybersecurity Architect Expert).
Vendor-neutral certifications such as CISSP.
Bachelor's degree in cybersecurity, IT, or a related field, or equivalent experience.

Responsibilities

Monitor alerts and incidents across client tenants using Microsoft Sentinel, Defender XDR, Defender for Endpoint, Defender for Identity, Defender for Office 365, and Defender for Cloud Apps.
Triage incidents enriched by automated playbooks, verify enrichment accuracy, meet acknowledgment and containment SLAs, and distinguish true positives from false positives and benign activity.
Investigate suspicious sign-ins, risky users, and conditional access failures in Microsoft Entra ID.
Write and tune KQL queries for threat hunting, investigations, and detection rule development.
Trigger, approve, or reverse automated and on-demand containment playbooks in accordance with each client's authorized-actions matrix.
Operate and author Sentinel automation rules and Logic Apps playbooks.
Escalate confirmed incidents to senior analysts or incident response teams with a complete timeline and supporting evidence.
Review automated containment actions requiring human approval, including device isolation, account disablement, and email quarantine for VIPs or critical assets.
Validate automated outcomes and reverse incorrect actions, such as releasing a device, re-enabling a user, or restoring email.
Monitor playbook health, including Logic App run history, failed runs, throttling, and expired connector or API connections.
Maintain client-specific automation settings, including watchlists, automation rule order and conditions, and severity-based notification routing.
Ensure client notifications accurately describe the automated action, its timing, and the playbook used.
Identify and report opportunities for automation and tuning based on repeated manual work, false-positive patterns, or noisy rules.
Follow change control procedures; submit production playbook changes through Sentinel Repositories/CI-CD rather than editing production environments directly.
Notify clients of incidents by phone, email, or ticketing system according to severity and client runbooks.
Write incident summaries and remediation recommendations for technical and non-technical audiences.
Contribute to monthly client security reports and service reviews.
Tune analytics rules to reduce alert noise across multi-tenant environments.
Update runbooks, knowledge base articles, and shift handover notes.
Track emerging threats and Microsoft security updates and share relevant findings with the team.
Participate in rotating evening, weekend, holiday, and after-hours on-call coverage for 24/7 client protection.
Follow each client's escalation matrix, including after-hours phone contacts for critical incidents.
Maintain reliable home internet and a phone for remote shifts and on-call coverage.

Benefits

Medical, dental, and vision insurance beginning on the first day of employment.
Flexible Spending Account and Dependent Care Account.
401(k) with profit sharing.
9+ holidays and discretionary time off structure.
Parental leave for primary and secondary caregivers.
Tuition Assistance Program and CPA support program with a cash incentive upon completion.
Discretionary incentive compensation based on firm, group, and individual performance.
Incentive compensation related to origination of new client sales.
Wellness program.
Flexible working environment, including remote and hybrid options.
Competitive compensation and industry-leading benefits.