Demo

Network Security Analyst

Lennox International
Richardson, TX Full Time
POSTED ON 1/9/2026
AVAILABLE BEFORE 9/22/2027
Who We Are:
Lennox (NYSE: LII) Driven by 130 years of legacy, HVAC and refrigeration success, Lennox provides our residential and commercial customers with industry-leading climate-control solutions. At Lennox, we win as a team, aiming for excellence and delivering innovative, sustainable products and services. Our culture guides us and creates a workplace where all employees feel heard and welcomed. Lennox is a global community that values each team member’s contributions and offers a supportive environment for career development. Come, stay, and grow with us.
What Drives Success:

The Network Security Analyst position will act as a first-level escalation point for concerns involving firewall access requests, network troubleshooting, and VPN issues. The analyst will be responsible for initial response to incidents involving client VPN and troubleshooting firewall issues.

  • Design and implement approved firewall change requests in accordance with established guidelines.
  • Perform operational checks of the firewalls to ensure optimal operation.
  • Conduct periodic review of firewall policies to identify and remove any unused, duplicate, or expired objects and/or rules through change management.
  • Troubleshoot network connectivity issues involving systems, applications, and services.
  • Initiate the RMA of faulty firewall equipment.
  • Work closely with the security engineering team to implement security enhancements and/or mitigate identified security gaps.
  • Assist with firewall updates, and operating system upgrades.
  • Assist with troubleshooting client VPN connectivity issues.
What We Are Looking For:
  • 2 to 3 years of experience administering enterprise class NextGen firewalls.
  • 1 to 3 years of experience working with Windows and Linux systems.
  • One or more of the following certifications is preferred: (ISC)2 SSCP, CompTIA Security , Palo Alto PCNSA/PCNSE, SANS GSEC, or Cisco CCNP Security.
  • Associates degree in related field or equivalent experience required.
  • Basic understanding of malware (computer viruses, worms, spyware, ransomware, etc.) and associated risk mitigation techniques.
  • Strong understanding of next generation firewall technologies; Palo Alto experience preferred.
  • Strong understanding of the uses and associated cyber security risks of well-known network ports and protocols such as SSL, HTTP, DNS, SMTP, FTP, SSH, IPsec, etc.
  • Understanding of threat mitigation profiles and configuration in next generation firewalls.
  • Strong intrusion detection / prevention system (IDS/IPS) knowledge.
  • Ability to interpret and understand firewall traffic and threat logs.
  • Ability to troubleshoot network connectivity and application problems.
  • Strong understanding of computer network routing and switching fundamentals.
  • Familiarity of Windows Server 2008/2012/2019 and Windows 10
  • Familiarity of the Linux operating system.
  • Familiarity of current threats and trends in Cyber Security.
  • Basic understanding of cyber security frameworks (e.g., NIST, zero trust).
What We Offer:
This position is based 100% onsite in the office, Monday through Friday.

Compensation
: This is a salaried exempt role. The starting salary range for this role and market is between $75,000-$100,000 annually. Factors that may affect starting salary include geography/market and the skills, education, experience, and other qualifications of the successful candidate. Employees in this role are also eligible for an annual bonus in accordance with the terms of the Company’s applicable plan. Employees in this role are not eligible for overtime.

Benefits
: Subject to applicable eligibility requirements, the following benefits are offered for this role: tuition reimbursement; medical, dental, and vision insurance; prescription drug coverage; 401(k) retirement plan; short-term disability insurance; 8 weeks paid birthing leave; 2 weeks paid bonding leave; life and long-term disability insurance.

Depending on date of hire, and subject to applicable eligibility requirements, new employees in this role also receive up to: 12 days paid time off, 2 paid well-being days, 1 paid volunteer day, 12 paid holidays, and 3 floating holidays per year.

Our Culture
: At Lennox, our Core Values of Integrity, Respect & Excellence are ingrained in the fabric of the organization. They define our culture – which is about how we do business and how we treat others. Lennox is not just a workplace; we are a global community that values each team member’s contributions. As an equal opportunity employer, we are committed to recruit, develop, and retain talented individuals from a wide range of backgrounds, ensuring that everyone has the opportunity to succeed and contribute to our continued growth and success. At Lennox, you’ll take pride in our brands, knowing you are part of something special. Come, stay, and grow with us!

Disclaimers: The compensation and benefits information is accurate as of the date of this posting. Lennox reserves the right to modify this information at any time, with or without notice, subject to applicable law.
#LI-MH2 #LI-Onsite

Salary : $75,000 - $100,000

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