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Senior Network Security Engineer

Northwestern Mutual
life insurance
United States, Wisconsin, Milwaukee
720 E Wisconsin Ave (Show on map)
Apr 06, 2026

Job Description: The Senior Network Security Engineer at Northwestern Mutual Life Insurance Company in Milwaukee, WI will be responsible for firewall design and implementation, platform maintenance, and support of NextGen Firewall technologies. Act as Tier 3 escalation for Tier 2 and Tier 1 network security problems and incidents and troubleshoot as needed. Respond to IT service management internal event management alerts and resolve major incidents. Utilize network traffic metrics to identify problems and avoid production network impact. Manage and maintain security tools and infrastructure that supports network security. Focus on designing and implementing automation to create efficiencies. Utilize Network Security Appliances and Applications, Site-To-Site VPN, Client VPN, Encryption/Decryption methods, Content Filtering and Network Access Policies. Address security issues using knowledge of attack methods and countermeasures. Utilize networking concepts including DNS, IP, NAT, VLANs, subnetting, and OSI Model. Practice cryptography controls and underlying concepts to secure data. Participate and practice Agile methodologies. Guide and mentor junior team members. Utilize web and network protocols including TCP, UDP, and HTTP/S. Recommend process efficiencies to reduce resolution time. Telecommuting permitted 2 days per week. Salary $123,365- $193,310 per year.

Minimum Requirements: Bachelor's degree in Computer Engineering, Electrical Engineering, or related field, plus 5 years of experience as a security engineer, systems engineer, or in a related occupation. Experience must include 4 years with each of the following: (1) Network Security Appliances and Applications, Site-To-Site VPN, Client VPN, Encryption/Decryption methods, Content Filtering and Network Access Policies; (2) attack methods and countermeasures; (3) security logs including firewalls, proxies, and active directory; (4) networking concepts including DNS, IP, NAT, VLANs, subnetting, and OSI Model; (5) cryptography controls and underlying concepts to secure data; and (6) web and network protocols including TCP, UDP, and HTTP/S.

Interested candidates send resume to apply@northwesternmutual.com. Reference code 416 in the subject line.

We believe in fairness and transparency. It's why we share the salary range for most of our roles. However, final salaries are based on a number of factors, including the skills and experience of the candidate; the current market; location of the candidate; and other factors uncovered in the hiring process. If noted, this is standard pay structure for this position.

Grow your career with a best-in-class company that puts our clients' interests at the center of all we do. Get started now!

Northwestern Mutual is an equal opportunity employer who welcomes and encourages diversity in the workforce. We are committed to creating and maintaining an environment in which each employee can contribute creative ideas, seek challenges, assume leadership and continue to focus on meeting and exceeding business and personal objectives.

If you work or would be working in California, Colorado, New York City, Washington or outside of a Corporate location, please click here for additional information pertaining to compensation and benefits.

FIND YOUR FUTURE

We're excited about the potential people bring to Northwestern Mutual. You can grow your career here while enjoying first-class perks, benefits, and our commitment to a culture of belonging.


  • Flexible work schedules
  • Concierge service
  • Comprehensive benefits
  • Employee resource groups
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