Senior IT Cybersecurity Specialist (On-Site)

Groundswell•McLean, VA

7d•$116,724 - $209,019•Onsite

About The Position

Groundswell is seeking an experienced, hands-on Cybersecurity Specialist to serve as the senior on-site technical support for cybersecurity operations, Microsoft Azure Government, Microsoft 365 GCC High, cloud infrastructure, identity, endpoint security, networking, and incident response. This role will serve as an escalation point for complex security and infrastructure issues, and to help strengthen Groundswell's internal cyber capabilities, supporting the company's ongoing compliance with CMMC level 2. The position will be responsible for investigations, configuration, troubleshooting, control implementation, and high-impact issue resolution. The individual contributor position works closely with small internal operations team and External Supplier teams.

Requirements

Bachelor's degree in cybersecurity, computer science, information systems, engineering, network engineering, or a related technical field.
10 year years + experience in cybersecurity operations, cloud security, infrastructure engineering, network engineering, incident response, or a related field.
Direct hands-on experience with Microsoft GCC High, Azure Government, Department of Defense cloud environments, or a comparable regulated Microsoft environment.
Advanced production experience with Microsoft Sentinel, Defender XDR, Entra ID, Intune, Purview, Exchange Online, SharePoint Online, Teams, Azure networking, Azure Virtual Desktop, KQL, and PowerShell.
Hands-on experience administering enterprise network infrastructure and resolving complex cloud, identity, endpoint, and network issues.
Demonstrated experience producing technical evidence for audits or assessments, remediating security findings, validating corrective actions, and explaining technical risks and controls to technical and nontechnical audiences.
Ability to lead incident response under pressure, remain personally hands-on, exercise discretion with CUI and sensitive records, manage competing priorities, and work effectively with a variety of customers.
US Citizenship required for clearance purposes.

Nice To Haves

Microsoft Cybersecurity Architect Expert, Microsoft Security Operations Analyst Associate, or Microsoft Azure Security Engineer Associate certification.
Demonstrated experience leading AvePoint backup and recovery, security automation, or large-scale operational improvement in a regulated Microsoft Government cloud environment.
Advanced Cisco networking experience, including CCNP Enterprise or Cisco Meraki Solutions Specialist certification.

Responsibilities

Own cybersecurity operations to include incident response, investigations, response, threat identification threat, containment, recovery, root-cause analysis, and post-incident improvements.
Serve as an escalation point for complex security, cloud, identity, endpoint, network, Azure Virtual Desktop, and infrastructure issues.
Administer privileged access and identity controls, including Conditional Access, multifactor authentication, service principals, Privileged Identity Management, least privilege, separation of duties, and time-limited elevation.
Maintain Cisco Meraki environment, including firewalls, switches, wireless access points, VLANs, access-control lists, segmentation, logging, site connectivity, outage response, and recovery documentation.
Perform vulnerability and configuration management using Tenable, Microsoft Defender, Microsoft Secure Score, vendor advisories, and threat-intelligence sources. Prioritize findings based on severity, exploitability, exposure, asset criticality, known exploitation, operational risk, and CUI impact; coordinate remediation, document exceptions and residual risk, and confirm corrective actions are effective.
Lead AvePoint backup and recovery for Microsoft 365 GCC High, including monitoring jobs, resolving failures, testing restores, and maintaining recovery practices for Exchange, SharePoint, OneDrive, and Teams.
Serve as a technical subject matter expert for CMMC Level 2 and related certification programs by maintaining the System Security Plan, Plans of Action and Milestones, etc.
Provide senior escalation support while preserving the Helpdesk's responsibility for routine ticket intake and normal user support, and mentor Helpdesk personnel in incident recognition, evidence preservation, escalation, troubleshooting, and documentation.
Prepare, review, implement, and document technical changes in support of CMMI-SVC, ISO 9001, ISO/IEC 20000-1, ISO/IEC 27001, UK Cyber Essentials, and CMMC requirements.