Senior Cybersecurity Engineer: Commonwealth Holdings, Inc.

The Senior Cybersecurity Engineer is responsible for designing, implementing, and managing enterprise security solutions with a primary focus on the Microsoft security ecosystem, including Microsoft Defender, Microsoft Sentinel, Microsoft Purview, and Microsoft Entra, Microsoft Security Copilot.

This role serves as a senior technical leader in cybersecurity operations, threat detection, identity security, and data protection, while also supporting broader IT infrastructure and end-user support initiatives as needed. The ideal candidate combines deep technical expertise with a practical, hands-on approach to operational support in a fast-paced environment.

Primary Responsibilities:

• Lead the deployment, configuration, and optimization of:

• Microsoft Defender (Endpoint, Identity, Office 365, Cloud Apps)
• Microsoft Sentinel (SIEM/SOAR)
• Microsoft Purview (Data Governance, Compliance, DLP, Insider Risk)
• Microsoft Entra (Identity, Conditional Access, Privileged Identity Management)
• Microsoft Security Copilot
• Microsoft Agent 365

• Design and maintain security architecture aligned with Zero Trust principles
• Develop and tune detection rules, analytics, and automated response playbooks in Sentinel
• Monitor and respond to alerts, incidents, and threats across Microsoft security platforms
• Lead incident response activities including triage, investigation, containment, and remediation
• Conduct threat hunting and proactive risk identification
• Maintain and improve incident response plans and procedures
• Analyze Indicators of Compromise (IOCs) and emerging threat intelligence
• Manage identity lifecycle, governance, and access controls within Microsoft Entra ID
• Implement Conditional Access, MFA, and privileged access strategies
• Support passwordless and phishing-resistant authentication strategies (e.g., FIDO2)
• Implement and maintain Data Loss Prevention (DLP), retention, and compliance policies using Purview
• Support regulatory and compliance initiatives (e.g., NIST, CIS, ISO, CMMC as applicable)
• Perform data classification and protection strategy development
• Conduct vulnerability assessments and coordinate remediation efforts
• Manage endpoint and cloud security posture using Defender tools
• Provide risk reporting and security metrics to leadership
• Provide tier 2/3 support for security-related issues across infrastructure and end-user environments
• Assist IT team with:
• Endpoint management (Intune, device security)
• Microsoft 365 administration
• Microsoft Entra Identity and network security (ID, AD, PIM, PAM, FIDO)
• Manage 3rd party security vendors (Microsoft, 24/7 SOC)
• Document security processes
• Respond to security audits
• Act as escalation point for complex IT and security issues
• Evaluate and implement new security technologies and best practices
• Partner with internal stakeholders to align security with business objectives
• Contribute to long-term cybersecurity roadmap and strategy

Do you have experience in Zero Trust security?, * Deep hands-on experience with: *

• Microsoft Defender suite
• Microsoft Sentinel (SIEM/SOAR operations)
• Microsoft Entra ID (identity and access management)
• Microsoft Purview (compliance and data governance)

• Strong understanding of:

• Zero Trust architecture
• Cloud security (Azure/Microsoft 365)
• Identity and access management best practices

• Network Security and firewalls
• Experience with incident response and threat hunting
• Familiarity with regulatory frameworks (NIST, CIS, ISO, CMMC, etc.)

Preferred Qualifications:

• Microsoft certifications (highly preferred):

• SC-200 (Security Operations Analyst)
• SC-300 (Identity and Access Administrator)
• SC-400 (Information Protection Administrator)
• AZ-500 (Azure Security Engineer)

• Experience in construction, field-based, or multi-site environments (nice-to-have)
• Knowledge of endpoint management via Microsoft Intune
• Experience integrating security tools with ERP or business systems

Education and Experience:

• 5-10+ years of experience in cybersecurity, with at least 3+ years in a senior or lead roll

Commonwealth Holdings, Inc. is the parent company of three subsidiaries that deliver comprehensive electrical and technology solutions across multiple states. Commonwealth Electric Company of the Midwest provides full-service electrical contracting, Confluence Technology Group specializes in low-voltage systems and technology integration, and Rydalch Electric is a long-standing leader in Utah's construction industry, offering electrical construction services for commercial, institutional, and industrial markets. Together, these companies operate across Arizona, Iowa, Nebraska, and Utah, serving diverse sectors with expertise and reliability. With a Commitment to Excellence, Commonwealth uses a combination of disciplines, expertise, and our four core values (Customers, Employees, Character, and Mastery) to serve our customers with the highest quality of work. We employ hundreds of skilled employees nationwide, so if you are interested in becoming part of our team, keep on reading! What We Offer: Employee Ownership: As employee owners, a key component to our company culture is that every team member has a stake in our success. Your hard work directly contributes to the growth and prosperity of the company, and you share in the rewards. Work-Life Balance: We understand how important work-life balance and personal wellbeing are, which is why we're committed to fostering a supportive environment that prioritizes both-because when you thrive, we all do. Benefits: Qualified employees are offered comprehensive and competitive benefits package to protect them and their families from the unknown. Mentorship: Each new team member is paired with a mentor who provides guidance, support, and valuable insights throughout your onboarding experience and beyond. Career Development: With access to continuous learning opportunities and training programs, you can advance your career and stay at the forefront of industry innovations. Leadership Development: Whether you are just starting out or looking to take the next step in your career, we provide opportunities for leadership development to provide you the tools and support you need to succeed.