Security Analyst

D.R. Horton•Arlington, TX

About The Position

D.R. Horton, Inc., the largest homebuilder in the U.S., was founded in 1978 and is a publicly traded company on the New York Stock Exchange. It is engaged in the construction and sale of high quality homes designed principally for the entry-level and first time move-up markets. The Company also provides mortgage financing and title services for homebuyers through its mortgage and title subsidiaries. Please visit our website at www.drhorton.com for more information. D.R. Horton, Inc. is currently looking for a Security Analyst. The right candidate will address daily tasks and routine processes for IT security. This position will be responsible for assessing IT security incidents and applying the necessary technical troubleshooting steps to resolve the issue. The Security Analyst will also be responsible for monitoring suspicious or malicious activity in the company IT infrastructure and addressing security risk and incidents.

Requirements

High school diploma or GED.
1–4 years of experience in IT or network security.
Understanding of network architectures, network protocols, and traffic analysis.
Experience with security operations, incident response, or forensic analysis.
Knowledge of DNS, Active Directory, network routing/switching, or authentication services.
Experience with security or monitoring platforms (SIEM, IDS/IPS, EDR, NetFlow, packet capture tools).
Strong communication, documentation, collaboration, and customer service skills.
Ability to work independently or within a team.
Ability to interpret technical research and apply it to real‑world security problems.
Proficiency with Microsoft Office and email.

Nice To Haves

Bachelor’s Degree in Cybersecurity, Information Security, or related discipline.
Experience with enterprise firewalls, VPNs, or secure access solutions.
Familiarity with DDoS concepts, threat‑hunting methodologies, or network‑security frameworks.
Strong attention to detail and the ability to manage multiple tasks simultaneously.

Responsibilities

Monitor network traffic and alerts for indicators of compromise, malicious behavior, lateral movement, or anomalous activity.
Respond to and investigate network‑based security incidents across firewalls, routers, switches, wireless environments, and cloud interconnectivity.
Support DDoS detection, mitigation coordination, and response.
Maintain and improve network security configurations such as ACLs, VLAN segmentation, VPN policies, and IPS/IDS signatures.
Assist in managing and reviewing logs from security tools (SIEM, IDS/IPS, NetFlow analyzers, EDR/XDR platforms).
Manage and monitor email security and email flow. Detect phishing scams and analyze email headers. Understanding of DEMARC/DKIM/SPF security a plus.
Maintain content filtering platform and determine risk with websites or URLs. Knowledge of domain registration and reputation scoring is optimal.
Partner with the Networking and IT Operations teams to troubleshoot connectivity, authentication, or routing issues affecting system security.
Maintain DNS security hygiene, including DNS records, name resolution integrity, and DNS‑related attack protections.
Work with F5 or other load‑balancing/DNS traffic‑management technologies to ensure secure traffic distribution.
Support Active Directory and ADFS from a security perspective, including authentication flows, privileged access, and hardening standards.
Assist with identity‑related investigations or authentication anomalies.
Analyze security advisories, CVEs, and vendor bulletins specifically for network and infrastructure components.
Validate successful patch deployment across network appliances, security tools, and infrastructure systems.
Coordinate with SCCM and infrastructure teams to ensure patching is aligned with risk priorities and security controls.
Perform network‑centric forensic investigations, including packet captures, log correlation, and threat‑hunting activities.
Identify root causes of network compromise and recommend containment or mitigation strategies.
Document incident findings and collaborate with teams to close security gaps.
Contribute to network‑security projects, deployments, and upgrades.
Provide subject‑matter input on firewall changes, secure architecture designs, and network segmentation initiatives.
Work with cross‑functional teams to ensure secure rollouts of new applications or services.
Participate in the weekly on‑call rotation and respond to after‑hours incidents.
Mentor Security Administrators and junior team members.
Support IT operational emergencies when they impact business‑critical systems.
Travel overnight as required.