Senior Security Analyst

Cybersecurity Jobs; Arlington (TX); On-site; USD 110,000 - 160,000; Full time

Benefits offered by this job

Medical, Dental and Vision

401(K)

Employee Stock Purchase Plan

Flex Spending Accounts

Life & Disability Insurance

Vacation, Sick, Personal Time and Holi

Job summary

D.R. Horton is seeking a Senior Security Analyst to keep business systems secure and running in an on-site role in Arlington, TX.

You will handle day-to-day IT security operations while leading investigations, patching, and security projects, including weekly on-call coverage for Active Directory management and forensic operations. Responsibilities include maintaining domain controllers, AD FS and DNS, applying patches, and guiding Security Analysts.

Qualifications

• 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.

Responsibilities

• Handle daily IT security tasks and routine processes.
• Lead efforts to address IT security concerns and explain investigation results.
• Delegate tasks to Security Analysts and Administrators.
• Communicate outcomes of security investigations to IT Operations teams.
• Maintain and troubleshoot domain controllers and AD-related services.
• Support ADFS server maintenance and authentication work with IT Ops and Development.
• Manage DNS zones, F5 DNS VIPs and pools, and AD sites/subnets.
• Manage Group Policy, WMI Filters, and GPO troubleshooting.
• Perform patching operations and address vulnerabilities across systems.
• Coordinate patching with SCCM and confirm proper configuration.
• Ensure patches are installed and security apps function after patching.
• Support outbreak prevention and forensic investigations.
• Investigate infrastructure weaknesses and report malicious activity.
• Collaborate on deployments and IT security projects.
• Participate in weekly on-call rotation for AD, Forensic Ops, and IT Ops.
• Mentor Analysts and train team members on tasks.
• Define and deploy IT security projects and report status to leadership.
• Provide detailed explanations of investigation results and incident outcomes.

Skills

Security operations

Forensic operations

On-call experience

Leadership

Project management

Network security

Troubleshooting

Communication

Documentation

MS Office

Education

Bachelor's degree in Cyber Security

Tools

Active Directory

Active Roles

ADFS

DNS

F5 DNS

Group Policy

WMI

GPOs

SCCM

MS Office

Email

Job description

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