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Marsh & McLennan Companies

Senior Network Security Engineer

The Senior Network Security Engineer role is responsible for ensuring the availability and efficient operations of MMC's global network-related security infrastructure.

MMC is looking for talent that is incredibly skilled in *one or more* of the following:

  • Cisco ASA Firewalls
  • Cisco FirePower IPS/IDS
  • PaloAlto Network Firewalls
  • Blue Coat Proxy
  • Zscaler Proxy
  • F5 ASM
  • FireEye NX, HX, EX
  • AWS / Azure Security

Technologies:  Next-generation firewalls, web application firewalls, proxies, advanced malware prevention, data loss prevention, intrusion detection/prevention systems, and cloud operations.

Daily tasks consist of but not limited to change and configuration management of firewall policies, Tier III-IV incident troubleshooting, root cause analysis, problem and solution patching, capacity management and system upgrades to network security infrastructure.

This position will also participate in Cyber Security Incident Response activities.  The Senior Network Security Engineer role reports to the Senior Security Operations Manager.

Security Operations is a crucial role within MMC.  Technical expertise combined with positive, collaborative, can do attitudes are required to make this team successful.

Travel:  Less than 1%.

Work from Home:  up to 50%

Minimum Qualifications

  • 5+ years of network security experience within large-scale operations.
  • One or more of the following:  Cisco ASA, FirePower, Palo Alto, BlueCoat Proxy, Zscaler, F5 ASM and/or FireEye
  • Expertise knowledge of TCP/IP and related protocols and with collecting and evaluating HTTPS & TCP/IP dumps using Wireshark, HTTPWatch, tcpdump, Fiddler, and similar tools.
  • Strong analytical, problem-solving, and root cause analysis skills relating to security operations technologies.
  • Excellent verbal, written and collaborative interpersonal communication skills.
  • Working knowledge of Unix/Linux CLI.

Bonus Qualifications

  • Administration of Blue Coat Proxy SG 250-430 certification.
  • Blue Coat Proxy Administrator or Professional (BCCPA or BCCPP) certification.
  • PaloAlto Networks PCNSE v8 certification.
  • FireEye HX & NX experience and certifications.
  • F5 Application Security Manager (ASM) expertise & Exam 303-BIG-IP ASM Specialist.
  • Cisco ASA & Firepower with CCNA CyberOps, CCNA Security, and/or CCNP Security certifications.
  • Experience operating within AWS and Azure environments.
  • SANS/GIAC certifications

Marsh & McLennan (NYSE: MMC) is the world’s leading professional services firm in the areas of risk, strategy and people. The company’s more than 60,000 colleagues advise clients in over 130 countries. With annual revenue over $13 billion, Marsh & McLennan helps clients navigate an increasingly dynamic and complex environment through four market-leading firms. Marsh advises individual and commercial clients of all sizes on insurance broking and innovative risk management solutions. Guy Carpenter develops advanced risk, reinsurance and capital strategies that help clients grow profitably and pursue emerging opportunities. Mercer delivers advice and technology-driven solutions that help organizations meet the health, wealth and career needs of a changing workforce. Oliver Wyman serves as a critical strategic, economic and brand advisor to private sector and governmental clients. For more information, visit, follow us on LinkedIn and Twitter @mmc_global or subscribe to BRINK.

Marsh & McLennan Companies offers competitive salaries and comprehensive benefits and programs including: health and welfare, tuition assistance, 401K, employee assistance program, domestic partnership benefits, career mobility, employee network groups, volunteer opportunities, and other programs. For more information about our company, please visit us at: We embrace a culture that celebrates and promotes the many backgrounds, heritages and perspectives of our colleagues and clients. For more information, please visit us at:

Marsh & McLennan Companies and its Affiliates are EOE Minority/Female/Disability/Vet/Sexual Orientation/Gender Identity employers.

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