Senior Security Engineer (IT)

Description

Robert Half is looking for a Senior Security Engineer for our client in the Milwaukee area. This role will help strengthen and support enterprise security operations across a mix of internal systems and client-facing environments. It focuses on security tooling, threat detection, incident response, infrastructure hardening, and continuous improvement initiatives.

The ideal candidate brings a strong systems and security background, enjoys solving complex technical problems, and can work independently while collaborating with infrastructure, operations, and compliance teams.

What You'll Be Doing

• Manage and improve core security technologies including SIEM, endpoint protection, vulnerability management platforms, identity and access controls, email security, and centralized logging solutions.

• Investigate security events, suspicious activity, and high-priority alerts while coordinating containment, remediation, and recovery efforts.

• Enhance threat detection capabilities through custom alerting, security analytics, correlation rules, and dashboard development.

• Drive security hardening initiatives across Windows environments, Active Directory, servers, applications, and supporting infrastructure.

• Lead vulnerability remediation efforts by identifying risks, prioritizing findings, validating fixes, and tracking trends.

• Support endpoint security operations including malware investigations, ransomware response, identity-related threats, and advanced troubleshooting.

• Administer and optimize Microsoft 365 security technologies such as Defender, Conditional Access, MFA, Exchange security controls, and identity governance features.

• Partner with leadership and compliance stakeholders during audits, risk assessments, and remediation activities.

• Develop and maintain operational documentation including security standards, technical procedures, and incident response playbooks.

• Participate in security-related projects that improve visibility, resilience, automation, and operational efficiency.

• Provide technical guidance to junior team members and assist with knowledge sharing across the organization.

• Participate in escalation and after-hours support for critical security incidents as needed.

Requirements

• 5+ years of experience in cybersecurity, systems administration, infrastructure security, or security operations.

• Strong experience supporting enterprise security platforms such as SIEM, EDR/XDR, vulnerability management, and identity management solutions.

• Advanced knowledge of Windows Server, Active Directory, Group Policy, and security best practices.

• Experience securing virtualized and hosted infrastructure environments.

• Ability to investigate complex technical issues and coordinate resolution across multiple teams.

• Experience with automation and scripting tools such as PowerShell, Bash, or similar technologies.

• Strong written and verbal communication skills with the ability to explain technical concepts to both technical and non-technical audiences.

Nice to Have

• Experience supporting Linux-based systems.

• Exposure to cloud security within Azure, AWS, or Google Cloud environments.

• Security certifications such as CISSP, Security+, CySA+, SC-200, AZ-500, or similar.

• Familiarity with firewalls, backup and recovery strategies, and enterprise security architecture concepts.

• Experience working within structured change management or IT service management environments.

Key Traits

• Strong troubleshooting and analytical skills.

• Comfortable taking ownership of complex technical challenges.

• Ability to balance security, operational stability, and business needs.

• Continuous improvement mindset with a passion for strengthening security controls.

• Collaborative team player who can also operate independently when needed.

Technology Doesn't Change the World, People Do.®

Robert Half is the world’s first and largest specialized talent solutions firm that connects highly qualified job seekers to opportunities at great companies. We offer contract, temporary and permanent placement solutions for finance and accounting, technology, marketing and creative, legal, and administrative and customer support roles.

Robert Half works to put you in the best position to succeed. We provide access to top jobs, competitive compensation and benefits, and free online training. Stay on top of every opportunity - whenever you choose - even on the go. Download the Robert Half app (https://www.roberthalf.com/us/en/mobile-app) and get 1-tap apply, notifications of AI-matched jobs, and much more.

All applicants applying for U.S. job openings must be legally authorized to work in the United States. Benefits are available to contract/temporary professionals, including medical, vision, dental, and life and disability insurance. Hired contract/temporary professionals are also eligible to enroll in our company 401(k) plan. Visit roberthalf.gobenefits.net for more information.

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