Alarm.com · 1 week ago
Principal Network Security Engineer
Tysons Corner, VA
Full-time
Onsite
Senior Level, Lead/Staff
7+ years expAlarm.com is the leading cloud-based platform for smart security and the Internet of Things. The Principal Network & Security Engineer will manage the organization's Cisco-based networking infrastructure, lead administration and optimization efforts, and ensure security best practices are applied across hybrid cloud and on-premises environments.
InternetInternet of ThingsSecurityWireless
No H1B
Responsibilities
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
Qualification
Required
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
Preferred
Relevant certifications (e.g., CCNP Security, CISSP, cloud security, or equivalent) are strongly preferred
Benefits
Subsidized medical plan options
An HSA with generous company contribution
A 401(k) with employer match
Paid holidays
Wellness time
Vacation increasing with tenure
Paid maternity and bonding leave
Company-paid disability and life insurance
FSAs
Well-being resources and activities
A casual dress work environment
Company
Alarm.com
Alarm.com is provides home and business security solutions based on wireless, web and mobile technologies.
1001-5000 employees
Funding
Current Stage
Public CompanyTotal Funding
$588MKey Investors
TCVABS Capital Partners
2024-05-29Post Ipo Debt· $425M
2015-06-26IPO
2012-07-24Series B· $136M
Leadership Team
Stephen Trundle
President & CEO
Jean-Paul Martin
CTO and Co-Founder
Recent News
2026-01-07
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2025-12-09
2025-12-05
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