Lennox-logo
Lennox
·
April 25, 2026
Apply Now
This job has closed.

Network Security Analyst

Richardson, TX
Full-time
Onsite
$75K/yr - $100K/yr
Entry, Mid Level
Lennox is a global leader in HVAC and refrigeration solutions, committed to delivering innovative products and services. The Network Security Analyst will act as a first-level escalation point for firewall access requests, troubleshooting network issues, and ensuring the optimal operation of firewalls.
Apply Now

Responsibilities

  • 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

Qualification

Required

  • 2 to 3 years of experience administering enterprise class NextGen firewalls
  • 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
  • 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
  • Ability to interpret and understand firewall traffic and threat logs
  • Ability to troubleshoot network connectivity and application problems
  • Knowledge of computer network routing and switching fundamentals
  • Familiarity of Windows Server 2008/2012/2019 and Windows 10
  • Familiarity of current threats and trends in Cyber Security
  • Basic understanding of cyber security frameworks (e.g., NIST, zero trust)

Preferred

  • One or more of the following certifications is preferred: (ISC)2 SSCP, CompTIA Security+, Palo Alto PCNSA/PCNSE, SANS GSEC, or Cisco CCNP Security

Benefits

  • 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
  • 12 days paid time off
  • 2 paid well-being days
  • 1 paid volunteer day
  • 12 paid holidays
  • 3 floating holidays per year
Lennox (NYSE: LII) is a leading provider of innovative climate control solutions for heating, ventilation, air conditioning, and refrigeration (HVACR) markets.
Glassdoor
3.6
Founded in 1895
Richardson, Texas, USA
10001+ employees
http://www.lennox.com
Lennox (NYSE: LII) is a leading provider of innovative climate control solutions for heating, ventilation, air conditioning, and refrigeration (HVACR) markets.
Glassdoor
3.6
Founded in 1895
Richardson, Texas, USA
10001+ employees
http://www.lennox.com