Senior Network Security Analyst

Lennox; Richardson (TX); On-site; USD 99,000 - 130,200; Full time

Benefits offered by this job

Tuition reimbursement

Medical insurance

Dental insurance

Vision insurance

401(k) plan

Paid time off

Job summary

Lennox is seeking a Network Security Analyst to act as a first-level escalation point for firewall access requests, VPN issues, and network troubleshooting. This full-time role may require some weekend or after-hours work to handle high-severity security issues.

The position emphasizes implementing firewall changes, monitoring firewall health, and collaborating with the security engineering team to close gaps. Strong communication and ongoing learning are valued.

Qualifications

• 5+ years of relevant experience, 2-3 years configuring Palo Alto NextGen Firewalls.
• Associates degree or equivalent experience required; certifications preferred.
• Excellent verbal and written communication skills; able to work after hours when needed.

Responsibilities

• Design and implement firewall changes per approved requests.
• Perform operational firewall checks for optimal performance.
• Review firewall policies to remove unused or duplicate rules.
• Assist IT teams with network connectivity and VPN issues.
• Attend change control, roadmap, and troubleshooting meetings.

Skills

Palo Alto NextGen

Firewall troubleshooting

Network troubleshooting

IDS/IPS knowledge

Windows administration

PuTTY/SSH tools

Education

Associates degree in related field

Related certifications preferred

Tools

PuTTY

Job description

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. This role is a full‑time employment opportunity. Some weekend and/or after‑hours work may be required to assist high severity security issues. The analyst will be responsible for initial response to incidents involving client VPN and troubleshooting firewall issues.

Essential Duties And 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.
• Assist IT teams in troubleshooting network connectivity issues involving systems, applications, and services.
• Attend meetings related to KT& troubleshooting issues, roadmap & project discussions and change control meetings.
• 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.
• Preparing escalations for the engineering team when determined a higher‑level issue exist or break fix is required.

Competencies

• Good understanding of malware (computer viruses, worms, spyware, ransomware, etc.) and associated risk mitigation techniques.
• Strong understanding of next generation firewall technologies; Palo Alto experience required.
• 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 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 11.
• 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).
• Familiarity with industry data security, privacy, and regulatory standards.
• Preferred ability to lift 25lbs.

Qualifications

• 5 Years of relevant experience with 2-3 years of experience managing and configuring Palo Alto NextGen Firewalls.
• 3 years of experience working with Windows operating 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.
• 1-2 years of experience using ssh connectivity tools such as Putty.
• Associates degree in related field or equivalent experience required.
• Excellent communication skills, both written and verbal required.
• Some experience working in environments that have Change Control processes.
• Self‑starter and able to work with minimal supervision.
• Ability to work individually and as part of a team.
• Ability to be flexible and work after business hours to support IT changes or troubleshoot issues.
• Ability to work in the office 5 days a week.
• Willingness to learn new technologies and platforms in the IT Security space.

What We Offer

Compensation

This is a salaried exempt role. The starting salary range for this role and market is between $99,000 - $130,200 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.