Senior Infrastructure Security Engineer

towerloan; Flowood (MS); On-site; USD 110,000 - 160,000; Full time

Job summary

Tower Loan is seeking a Senior Infrastructure Security Engineer to design, implement, and strengthen controls protecting enterprise infrastructure, networks, and data. The role focuses on threat detection, incident response, vulnerability management, and identity protection across on-premises data centers and branch locations.

You will lead security investigations, configure security platforms, and coordinate with infrastructure teams to harden Windows Server, VMware, and related environments.

Qualifications

• Extensive experience designing and implementing enterprise security controls.
• Strong knowledge of Windows Server, VMware, and on-prem data centers.
• Experience with threat detection, incident response, vulnerability management.

Responsibilities

• Design and improve cybersecurity controls for on-premises data centers and networks.
• Manage security platforms such as Fortinet, CrowdStrike, Proofpoint, Zscaler.
• Configure firewall policies, VPN security, network segmentation, and remote access.
• Lead security investigations, incident response, containment, and remediation.
• Develop and maintain endpoint detection and response capabilities.
• Support PCI DSS, SOC 2, audits, and regulatory compliance.

Skills

Cybersecurity architecture

Firewall & IPS

Incident response

SIEM & log analysis

Identity protection

Tools

Fortinet FortiGate

FortiManager

FortiAnalyzer

CrowdStrike

Zscaler

Proofpoint

Job description

We take pride in what we do! Deciding to come grow with us is an exciting opportunity to enhance your career success stories. You are the center to what we do. We would love to have you here!

The Senior Infrastructure Security Engineer is responsible for designing, implementing, maintaining, and strengthening the security controls that protect Tower Loan's enterprise infrastructure, networks, systems, and sensitive information. This position serves as a senior technical resource for security engineering, threat detection, incident response, vulnerability management, and identity protection.

A strong understanding of enterprise networking, Windows Server, VMware, and on-premises data centers is required to assess risks and protect these environments. The role works closely with infrastructure and network teams, with its primary focus on securing the technology environment.

Duties/Responsibilities:

• Design, implement, administer, and continuously improve cybersecurity controls protecting on-premises data centers, branch locations, endpoints, networks, and corporate systems.
• Administer and optimize security platforms, including Fortinet FortiGate, FortiManager, FortiAnalyzer, CrowdStrike Falcon, Proofpoint, Zscaler, and related technologies.
• Configure, review, and strengthen firewall policies, intrusion prevention, VPN security, network segmentation, and secure remote access controls.
• Monitor security events, alerts, logs, and threat intelligence to identify suspicious activity, unauthorized access, vulnerabilities, and potential incidents.
• Lead technical security investigations and incident response, including threat analysis, containment, remediation, recovery, and root-cause analysis.
• Develop and maintain endpoint detection and response capabilities, including prevention policies, detection rules, and response procedures.
• Manage email security protections, including phishing prevention, malicious attachment detection, email authentication, and data loss prevention.
• Strengthen Microsoft Entra ID and Active Directory security, including multifactor authentication, Conditional Access, privileged access, service accounts, and access control policies.
• Conduct vulnerability assessments, evaluate findings, prioritize remediation, and coordinate with infrastructure and application teams to reduce exposure.
• Establish and maintain system hardening standards and secure configuration baselines for Windows Server, VMware, network devices, and other infrastructure.
• Evaluate network architectures, routing, SD-WAN, VPN connectivity, and segmentation designs to identify weaknesses and recommend security improvements.
• Implement and maintain centralized security logging, monitoring, dashboards, alerting, and event correlation to improve visibility across enterprise systems.
• Perform security assessments of new technologies, infrastructure changes, network configurations, and system implementations.
• Support ransomware protection, backup security, immutable storage, disaster recovery safeguards, and the security aspects of business continuity planning.
• Develop automation using PowerShell, Python, or other tools to improve security monitoring, threat detection, and vulnerability remediation.
• Support PCI DSS, SOC 2, internal security audits, risk assessments, and other applicable regulatory and cybersecurity compliance requirements.
• Develop and maintain security policies, technical standards, incident response procedures, security diagrams, and supporting documentation.
• Collaborate with infrastructure, network, application development, and support teams to integrate security into technology operations and projects.
• Research emerging threats, attack techniques, vulnerabilities, and security technologies, recommending practical security improvements.
• Serve as a senior technical escalation resource for complex security issues and provide guidance to IT team members on cybersecurity best practices.
• Perform all other duties as assigned.

Required Skills/Abilities:

• Strong knowledge of cybersecurity architecture, infrastructure security, network security, and defensive security engineering.
• Advanced experience with firewalls, intrusion prevention, endpoint security, email security, identity protection, and threat detection.
• Strong understanding of enterprise LAN, WAN, SD-WAN, VPN, routing, switching, segmentation, and common network protocols from a security perspective.
• Working knowledge of Windows Server, Active Directory, VMware virtualization, enterprise storage, and on-premises data center infrastructure.
• Demonstrated ability to analyze security events, investigate suspicious activity, and coordinate technical incident response and remediation.
• Proficiency in vulnerability management, security hardening, risk assessment, and secure configuration practices.
• Understanding of SIEM platforms, log analysis, endpoint detection and response, and security automation.
• Knowledge of identity and access management, authentication protocols, pr