Senior Security Analyst

D.R. Horton is seeking a Senior Security Analyst to help keep business systems secure and running smoothly in an onsite role in Arlington, TX. In this full-time position, you will handle day-to-day IT security operations while also leading investigation, patching, and security project work, including weekly on-call coverage that involves Active Directory management, forensic operations, and other IT operations as needed.

Benefits include Medical, Dental and Vision, a 401(K), an Employee Stock Purchase Plan, Flex Spending Accounts, Life & Disability Insurance, and time off including Vacation, Sick, Personal Time and Company Holidays. The role also includes multiple voluntary and company-provided benefits.

Responsibilities

• Handle daily tasks and routine processes required for IT security.
• Lead efforts to address IT security concerns and help explain investigation results.
• Apply expert knowledge to complex issues and delegate tasks to Security Analysts and Administrators.
• Communicate outcomes of requests and security investigations to other IT Operations teams or employees.
• Maintain and troubleshoot domain controllers, including Active Roles management.
• Support Active Directory Federation Services (ADFS), including ADFS server maintenance, troubleshooting, and authentication work with IT Operations and Development teams.
• Manage DNS zones, F5 DNS VIPs and pools, and Active Directory sites and subnets.
• Manage domain trust configuration and Group Policy Management, including WMI Filters, GPO troubleshooting, and cleanup.
• Perform patching operations, including research and preparation to address known vulnerabilities across company systems.
• Research patch risk and value, report the Company risk rating across all layers of the environment, and coordinate with SCCM administrators to confirm patching is configured correctly.
• Ensure required patches are installed on servers and workstations, and validate IT security applications function as designed after patching.
• Support isolation and outbreak prevention of infected company systems.
• Mitigate and block DDoS and other network attacks as needed, and conduct forensic investigations to determine root cause of compromises or exploited vulnerabilities.
• Investigate infrastructure weaknesses and report malicious activity or potential risk.
• Partner with security and IT operations team members for deployments and maintenance, and architect, plan, and implement assigned IT security projects.
• Participate in a weekly call rotation and complete on-call response duties covering Active Directory management, Forensic Operations, and IT Operations as needed.
• Mentor Security Analysts and Security Administrators, and help train team members on learned tasks related to the duties.
• Write, assign, and deploy IT security projects, contribute to delegation as required, update senior members or managers on project status, and respond to escalated issues.
• Provide detailed explanations of technical investigation results and incident outcomes.

D.R. Horton expects all work to be conducted in a professional and ethical manner to serve customers and increase goodwill and profit of the company.

Requirements

• High school diploma or general education degree (GED).
• Three to five years of experience in an IT related field.
• Advanced knowledge of IT Security Operations and Forensic Operations.
• Advanced knowledge of IT Networking and Network Security Operations.
• Advanced knowledge of IT Infrastructure and Applications.
• Advanced knowledge of cyber attackers and threat actor tactics.
• Advanced experience with project management and delegation.
• Advanced business communication and collaboration skills.
• Advanced documentation skills, with the ability to work with teammates on projects and independently to complete assigned tasks.
• Ability to interpret research into solutions for real problems and provide customer service skills.
• Experienced mentoring and training skills.
• Ability to apply common sense understanding to carry out instructions furnished in written or oral form or via DRH applications.
• Proficiency with MS Office and email.
• Attention to detail and ability to manage multiple responsibilities.
• Bachelor’s degree in a Cyber Security discipline is preferred.

Other requirements: Ability to travel overnight.

On-Call & IT Operations Coverage

• Monitor and assist with IT operational emergencies to help keep business applications operational.
• Assist with IT operational tasks as needed.
• Weekly rotation on-call schedule includes Active Directory Management, Forensic Operations, and IT Operations as needed.

Projects

• Write, assign, and deploy IT security projects.
• Contribute to project delegation or assign projects as required.
• Update senior members or managers on project status.

Tools & Technologies

• Active Directory
• Active Roles
• Active Directory Federation Services (ADFS)
• DNS (Domain Name Service)
• F5 DNS VIPs and pools
• Active Directory Sites and Services
• Group Policy Management
• WMI Filters
• GPOs
• SCCM (System Center Configuration Manager)
• MS Office
• Email