Principal Network Security Engineer

The job

LIVE Employer public job feed (private-sector employer) Source: the employer's public careers feed · Data: listed 2025-07-14

Job description

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

Responsibilities:

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

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.

WHY WORK FOR ALARM.COM?

• Collaborate with outstanding people: We hire only the best. Our standards are high and our employees enjoy working alongside other high achievers.
• Make an immediate impact: New employees can expect to be given real responsibility for bringing new technologies to the marketplace. You are empowered to perform as soon as you join the Alarm.com team!
• Gain well rounded experience: Alarm.com offers a diverse and dynamic environment where you will get the chance to work directly with executives and develop expertise across multiple areas of the business.
• Focus on fun: Alarm.com places high value on our team culture. We even have a committee dedicated to hosting a stand-out holiday party, happy hours, and other fun corporate events.
• Alarm.com values working together and collaborating in person.  Our employees work from the office 4 days a week.

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. 

For more information, please visit www.alarm.com.

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!

Alarm.com is an Equal Opportunity Employer

In connection with your application, we collect information that identifies, reasonably relates to or describes you (“Personal Information”). The categories of Personal Information that we may collect include your name, government-issued identification number(s), email address, mailing address, other contact information, emergency contact information, employment history, educational history, criminal record, and demographic information. We collect and use those categories of Personal Information about you for human resources and other business management purposes, including identifying and evaluating you as a candidate for potential or future employment or future positions, recordkeeping in relation to recruiting and hiring, conducting criminal background checks as permitted by law, conducting analytics, and ensuring compliance with applicable legal requirements and Company policies. By submitting your application, you acknowledge that we may retain some of the personal data that you provide in your application for our internal operations such as managing our recruitment system and ensuring that we comply with labor laws and regulations even after we have made our employment decision.

Notice To Third Party Agencies:
Alarm.com understands the value of professional recruiting services.  However, we are not accepting resumes from recruiters or employment agencies for this position. In the event we receive a resume or candidate referral for this position from a third-party recruiter or agency without a previously signed agreement, we reserve the right to pursue and hire those candidate(s) without any financial obligation to you. If you are interested in working with Alarm.com, please email your company information and standard agreement to RecruitingPartnerships@Alarm.com.

The base salary range of this opportunity is listed below and is determined within a range based on factors including qualifications, location and experience. This allows opportunity for growth and development within the role. The base salary offered is part of a total compensation package.

Explore around this job

Field: Technology Sub-niche: Cybersecurity All jobs at Alarm.com Jobs in Virginia Jobs in Tysons, VA Tysons city guide Virginia state guide Fairfax County economy

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About the role

This is a — role in the Technology field (Cybersecurity) at Alarm.com.

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How to prepare and behave

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• Read the whole description and match your examples to its requirements; use the same words the posting uses where they are true for you.
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• Answer with short stories: the situation, what you did and the result. Give numbers when you have them and never invent them.
• Be honest about gaps; say what you did to learn and how fast you can close them.
• Ask about the team, the first 90 days, how success is measured and the schedule; do not open with salary and time off.
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• Send a short thank-you message within a day, mentioning one thing you discussed.
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The city

The job is in Tysons, VA. Below is what the official statistics say about living and working there.

How Tysons compares. Among the 100 largest places in Virginia, Tysons is #39 by population, #98 for homeownership (#1 = highest), #7 for college degrees (#1 = most), #11 for remote work (#1 = most). Its county, Fairfax County, is #3 of 133 counties for average pay ($114,100).

The place in numbers

Tysons has 28,936 residents (ACS 2020–2024), about 0.3% of the population of Virginia. It covers 4 square miles of land, which works out to roughly 6,785 people per square mile. The median age is 36.5, 6% younger than the state median (36.5 against 39.0). It is a census-designated place: a community the Census Bureau counts as a unit, without a city government of its own, so services such as police, roads and zoning usually come from the county.

Housing

The median gross rent is $2,497 a month (rent plus utilities), 58% above the state median ($2,497 against $1,579). Over a year that is 23.1% of the median household income. US housing guidance treats housing as affordable when it takes 30% of income or less, so the typical household is under that line. The median home value is $640,000, which is 4.9 times the median household income ($129,818). 34.3% of households own their home, 49% below the state average (34.3% against 67.3%). A low ownership share points to a rental-heavy market with more apartments and shorter stays.

Work and pay

The Washington-Arlington-Alexandria, DC-VA-MD-WV metropolitan area has 3,136,190 jobs in the BLS wage survey, and the median pay across all occupations is $71,060 a year, 39% above the national median ($71,060 against $50,980). The biggest occupation groups are business and financial operations (369,190 jobs, median $105,260); management (319,760 jobs, median $165,010); office and administrative support (290,050 jobs, median $53,250). The area is most specialised in legal (2.6 times) and computer and mathematical (2.2 times), where the share of workers is well above the national share. The best-paying groups with at least 5,000 jobs are legal ($175,070) and management ($165,010). In 2026M09 the unemployment rate of Fairfax County was 3.4%. 73.9% of residents aged 16 and over are in the labour force. The city lies in Fairfax County; its jobs, pay by industry and GDP are on the county page.

Getting around

Among workers, 49.6% drive alone, 4.4% use public transit, 5.4% walk, 34.2% work from home. 15.8% of workers commute 45 minutes or more, 10% below the state average (15.8% against 17.6%). Remote work is more common than in the state as a whole, which widens the set of employers a resident can work for without moving.

People and education

79.3% of adults aged 25 and over hold a bachelor's degree or higher, 88% above the state share (79.3% against 42.2%). 41.5% of residents were born outside the United States, 216% above the state share (41.5% against 13.1%). The poverty rate is 7.9%, 20% below the state rate (7.9% against 9.9%).

Climate

The warmest month is Jul, averaging 78°F (25.6°C), and the coolest is Jan at 31°F (-0.4°C). About 1,117 mm (44 inches) of precipitation falls in a year; May is the wettest month (120 mm) and Jan the driest (65 mm). These values come from NASA satellite-based climatology on a grid of about 50 km, so they describe the wider area, not a weather station in the city.

Nearby cities to compare

Closest cities in this guide: Vienna (2 miles, rent 4% lower); McLean (2 miles, rent 37% higher); Idylwood (3 miles, rent 18% lower); Wolf Trap (3 miles, rent 40% higher). Rent differences are against Tysons; use the Compare tab to put any two cities side by side.

Full guide to Tysons →Virginia guideAll jobs in Tysons

Official links for Tysons

• Census Bureau data profile for Tysons
• Official state website: virginia.gov
• BLS Economy at a Glance: Virginia

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Where to live

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Career paths

We could not match this title to one occupation, so here are the other sub-niches in Technology, where your skills may carry over:

Data, analytics and AI (3366) Software engineering (4089) Cloud, IT and infrastructure (1040) Product management (836)

Distances

This job has no single city we can place on the map (remote, flexible or unmatched location), so no distance table is shown. Browse all Technology jobs with distances from any of the 20 largest cities.

The employer

Alarm.com is the employer in this listing. See all its open jobs here →

We do not hold headcount or revenue for this employer. Check its careers site and, if it is listed on a stock exchange, its public filings (SEC EDGAR search).

What it is like to work at a company (culture, schedules, benefits) is not in the source data, so we do not describe it. Read the description and ask the questions under "How to prepare".

Other open jobs at Alarm.com

Similar jobs

Same sub-niche: Cybersecurity

More jobs in Tysons, VA

All Cybersecurity jobs → · All Technology sub-niches →

FAQ

What is the Principal Network Security Engineer job at Alarm.com?

A private-sector role in technology (cybersecurity) listed 483 days ago. The full description is on this page and on the employer's page.

Where is this job?

Tysons, VA.

How do I apply?

Use the "View this job and apply on the employer's page" button. AtiveSite does not receive applications.

How much does it pay?

The listing does not publish pay, and we could not match the title to one official occupation.

What is the cost of living there?

Median rent in Tysons is $2,497 a month and median household income $129,818 (ACS 2020–2024).

How old is this listing?

It was posted on 2025-07-14 (483 days ago). Jobs older than 90 days are not shown.

Are there similar jobs?

Yes: browse cybersecurity jobs in Virginia.

Sources and terms

• Job data: Alarm.com careers page public feed (listing dated 2025-07-14). The job disappears from this site when it disappears from the source.
• Wages and projections: BLS OEWS (May 2025) and Employment Projections 2025–35.
• City and county figures: Census Bureau ACS 2020–2024, BEA, BLS QCEW and LAUS, NASA POWER climatology; distances from Census Gazetteer coordinates.

AtiveSite is not affiliated with or endorsed by the employer or any government agency, and does not process applications. Verify every detail with the employer before acting.

Sources

• BLS OEWS (wages and employment by occupation, May 2025)
• BLS Employment Projections 2025–35
• BLS Local Area Unemployment Statistics
• BLS JOLTS
• BLS State and Metro Area Employment
• Census Bureau American Community Survey (via Census Reporter)
• BEA GDP by state and Regional Price Parities
• IRS 2026 tax adjustments
• U.S. Department of Labor, minimum wage by state
• Tax Foundation state income tax rates 2026
• USAJOBS
• USCIS
• U.S. Department of State, visas
• NASA POWER climatology
• GeoNames / Census Gazetteer (coordinates)