Sr IT Security Engineer | Tulsa, OK (ON-SITE)

Cybersecurity Engineer

Responsible for designing, implementing, maintaining, and continuously improving enterprise cybersecurity controls, architectures, and operational security capabilities across cloud, infrastructure, applications, endpoints, and data environments. Serve as a senior technical advisor and security subject matter expert responsible for protecting organizational systems, sensitive information, and mission-critical services against evolving cyber threats. Provide leadership in security engineering, threat detection, incident response, risk management, compliance, vulnerability management, cloud security, and secure systems design. Partner closely with infrastructure, development, operations, compliance, and business teams to design, test, implement and maintain security best practices and ensure alignment with organizational and regulatory requirements.

Responsibilities

• Designs, implements, documents, and maintains security systems and solutions.
• Implements and maintains cloud security controls including CSPM, IAM, encryption, logging, workload protection, and network segmentation.
• Supports secure administration of Microsoft Active Directory, Entra ID/Azure AD, Group Policy, DNS, DHCP, and related identity services.
• Performs security assessments based on current environment; and develops recommendations/action plans.
• Maintains cyber security risk register and cyber security plan.
• Performs advanced troubleshooting for networking, application, security system, and related system problems.
• Gathers detailed problem information, assesses the problem, determines the resources needed, and leads the problem resolution.
• Advises in the design, deployment, and administration of the following areas: cloud, infrastructure, networking, and applications including security related to these areas.
• Supports security monitoring, detection engineering, SIEM tuning, and threat hunting initiatives.
• Assists with confidential security investigations and insider threat activities.
• Plans, designs, implements, documents, and maintains disaster recovery and risk mitigation strategies.
• Provides leadership cyber security recommendations, costs, and implementation design/plans.
• Works with the leadership on confidential security investigations.
• Participates in and supports Cyber Incident Response Team (CIRT) activities including investigation, containment, eradication, recovery, and lessons learned.
• Provides administration, documentation, and implementation expertise for data security categorization, audit reporting, and protections.
• Assists in maintaining and advancing the security awareness program.
• Supports internal and external customers using appropriate email, telephone, and face-to-face interactions.
• Mentors less experienced staff in areas of cybersecurity technologies and practices.
• Leads or supports cybersecurity-related projects and cross-functional initiatives.
• Communicates cybersecurity risks, recommendations, and technical concepts effectively to technical and non-technical stakeholders.
• Facilitates team and project activities.
• Manages multiple projects without having direct supervisory responsibilities.
• Work is primarily performed in a climate-controlled office setting.
• Work requires lifting objects up to 10lbs.
• Work will require varied shifts including, weekends and holidays, as needed.

Qualifications

• Bachelor's degree and eight plus (8+) years of cyber security engineering experience in the areas of networking, application, data, and end users computing. or an equivalent combination of education and experience.
• CISSP, Security+, and Azure Security Engineer Associate certifications preferred.
• Experience with patch management, vulnerability management, 3rd party vendor assessments, cyber incident response, and common industry practices.
• Experience with security engineering, security assessments, design reviews and threat modeling.
• Experience with Zero Trust architecture, cloud-native security tooling, and automation/security orchestration.
• Experience with scripting or automation using PowerShell, Python, or similar languages.
• Experience with SIEM platforms such as Microsoft Sentinel
• Advanced knowledge of cloud security and associate tools.
• Advanced knowledge of computer security including knowledge of vulnerability and penetration testing, compliance testing, and disaster recovery planning.
• Advanced knowledge of Microsoft Active Directory including users, groups, servers, group policy, DNS, DHCP, and replication.
• Advanced knowledge of securing networks in areas such as Ethernet, firewalls, and Wi-Fi.
• Advanced knowledge and implementation of cyber forensics.
• Advanced knowledge of implementation, deployment, and administration of certificates and Public Key Infrastructure.
• Advanced knowledge of firewall and intrusion prevention system installation and rule administration.
• Advanced knowledge of security tools such as Qualys, Armis, MS Defender, MS Purview, and MS Cloud Security Tools
• Excellent analytical and problem-solving skills.
• Excellent communication skills.
• Excellent organizational and prioritization skills.
• Ability to work well under pressure and handle multiple projects at once.

About the Team

Cherokee Nation Businesses is a dynamic company that drives growth and innovation for the Cherokee Nation, the largest Native American tribe in the United States and our sole shareholder. As the holding company of our diverse family of businesses, we offer exciting opportunities for those who are committed to our values and passionate about advancing our mission and your career. Our employees are part of something bigger. Every day, we explore new ways to grow the company and contribute to the success of the Cherokee Nation - improving the lives of our tribal citizens and the communities we are a part of. If you're looking for a career where you can make an impact, contribute to growth and be a part of something meaningful, CNB is a place where you can thrive. Elite Benefits Program (for eligible employees) :

• Comprehensive Medical Plan: including a $0 deductible plan for you to choose from for what is best for you and your family.
• Preparing You For the Future: Contribute to a fully vested, 6% employer match 401(k) plan to help prepare you for retirement.
• Financial Incentives: Earn incentives based on company performance or take advantage of our employee referral program, tuition reimbursement program, nationwide employee discount program & an employee emergency fund.
• Your Health in Mind: Access to free health clinics at select locations & 24/7 telemedicine access.
• Work-Life Balance: We offer maternity, paternal, and adoption leave, as well as flexible spending accounts & voluntary benefits for added peace of mind.

A Company with a Purpose:

• Guided by our Shared Enterprise Values:
• Work with Purpose, Serve with Purpose
• Gadugi - Work together for the common good
• Exemplify Integrity in everything we do
• Be Intentional in planning & Committed in delivery
• Your work has a lasting impact. CNB reinvests 63% of our profits back into the company reinvesting in our core businesses, funding our growth and further creating opportunities for our employees. The other 37% of our profits are delivered to the Cherokee Nation as a dividend to support crucial programs & services that improve the lives the Cherokee citizens & our communities.

Job Info

• Job Identification 31387
• Job Category Information Technology Services
• Posting Date 06/01/2026, 09:26 PM
• Job Schedule Full time
• Locations Tulsa - Corporate Woods (OK) (On-site)
• Regular or Temporary Regular