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.

• 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.

• 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…