Principal Network Security Engineer

About the role

The Principal Network & Security Engineer is responsible for the management, lifecycle operations, and security of the organization's Cisco-based networking infrastructure. This individual will be expected to lead the administration, configuration, monitoring, and ongoing optimization of core network systems and platforms, as well as apply best practices in security management. The role combines technical operational management of critical Cisco platforms with broad information security responsibilities across hybrid cloud and on-premises environments

The Engineer's primary job responsibilities include

• Administer, monitor, and optimize Cisco portfolio infrastructure, including firewalls, identity, and network analytics platforms.
• Execute routine software/firmware upgrades, patching, and configuration updates on network and security appliances.
• Ensure effective network segmentation and secure access by configuring and enforcing network access controls.
• Manage and maintain secure remote access solutions for users and devices.
• Deploy, configure, and tune next-generation network perimeter and detection tools to ensure consistent policy enforcement.
• Oversee application delivery and web application security solutions, assisting with WAF configuration and incident response.
• Monitor network telemetry and activity for anomalous behavior or security events.
• Respond to and investigate network, security, or operational incidents in both on-premises and cloud environments.
• Support DDoS and threat protection systems, maintaining readiness and reporting suspicious activity.
• Collaborate with infrastructure and app teams to design and implement secure, compliant architectures across cloud and datacenter.
• Participate in vulnerability management processes, remediating identified exposures across managed platforms.
• Contribute to security operations, including event and log analysis, and improving detection capabilities.
• Develop and maintain infrastructure documentation, runbooks, and operational standards.
• Enable automation for repeatable network and security processes using scripting and modern tools.
• Provide technical guidance and mentoring to junior staff on security best practices and platform operations.
• Other duties as assigned

Requirements

• Bachelor's degree in computer science, Engineering, or related field.
• Minimum 7 years of experience with enterprise networking and security, with significant hands-on Cisco platform management.
• Strong understanding of network firewalls, perimeter defense, and intrusion detection/prevention.
• Direct experience configuring and troubleshooting network access control systems and policies.
• Familiarity with cloud platform security fundamentals (AWS, Azure, or GCP) in hybrid enterprise environments.
• Practical knowledge of software, firmware, and patch management for large-scale infrastructure.
• Proficiency in troubleshooting layer 2/3 networking, VPNs, and secure remote access solutions.
• Experience with application delivery controllers and web application security.
• Ability to analyze network/endpoint telemetry and investigate security events or performance issues.
• Demonstrated skills using scripting or automation to streamline network/security management.
• Hands-on experience supporting vulnerability management and compliance requirements.
• High attention to detail, documentation, and change management practices.
• Excellent communication, collaboration, and mentoring skills.
• Willingness to stay current on evolving security threats and industry best practices.
• Relevant certifications (e.g., CCNP Security, CISSP, cloud security, or equivalent) are strongly preferred

Additional information

Please note that sponsorship of new applicants for employment authorization, or any other immigration-related support, is not available for this position at this time.

Company Info

Alarm.com is the leading cloud-based platform for smart security and the Internet of Things. More than 7.6 million home and business owners depend on our solutions every day to make their properties safer, smarter, and more efficient. And every day, we're innovating new technologies in rapidly evolving spaces including AI, video analytics, facial recognition, machine learning, energy analytics, and more. We're seeking those who are passionate about creating change through technology and who want to make a lasting impact on the world around them.

Company Benefits

Alarm.com offers competitive pay and benefits inclusive of subsidized medical plan options, an HSA with generous company contribution, a 401(k) with employer match, and paid holidays, wellness time, and vacation increasing with tenure. Paid maternity and bonding leave, company-paid disability and life insurance, FSAs, well-being resources and activities, and a casual dress work environment are also part of our outstanding total rewards package!