
Chief Network Architectural Specialist
4 hours ago
Mizuho Global Services is a subsidiary company of Mizuho Bank, Ltd. At Mizuho, we are committed to a culture that values ethical principles and diversity in our talent pool. Our development strategy is guided by three key pillars: Mutual Respect, Discipline, and Transparency.
As a Network Security Engineer at Mizuho, you will have immense exposure and learning opportunities. You will work with highly passionate leaders and mentors, and have the ability to build things from scratch. Our team is responsible for designing, implementing, and maintaining secure network infrastructures across enterprise environments.
Key Responsibilities:- Design and deploy secure network architectures for on-premises, cloud, and hybrid environments.
- Configure and manage firewalls, VPNs, proxies, and network access control systems.
- Monitor network traffic and security events using IDS/IPS and SIEM platforms.
- Conduct regular network vulnerability assessments and implement mitigation strategies.
- Collaborate with SOC and IT teams to investigate and remediate network-related incidents.
- Develop and enforce network security policies, standards, and procedures.
- Perform risk assessments and threat modeling for network infrastructure.
- Ensure secure configuration and patching of routers, switches, and other network devices.
- Lead network segmentation and zero-trust initiatives to reduce attack surface.
- Stay informed on emerging threats, vulnerabilities, and security technologies.
- 5–7 years of experience in network security engineering or architecture.
- Proficiency in configuring and managing enterprise firewalls (e.g., Palo Alto, Fortinet, Cisco ASA).
- Strong understanding of networking protocols (TCP/IP, DNS, DHCP, BGP, SNMP).
- Experience with IDS/IPS tools (e.g., Snort, Suricata, Cisco Firepower).
- Hands-on experience with SIEM platforms (e.g., Splunk, QRadar, LogRhythm).
- Familiarity with VPN technologies (IPSec, SSL VPN) and secure remote access.
- Knowledge of cloud networking and security controls (AWS, Azure, GCP).
- Experience with packet analysis tools (e.g., Wireshark, tcpdump).
- Scripting skills in Python, PowerShell, or Bash for automation and security tasks.
- Understanding of Zero Trust Architecture and secure SD-WAN implementations.
- Bachelor's degree in Computer Science, Information Security, or a related field.
- Relevant certifications such as CCNP Security, CISSP, CISM, CompTIA Security+, PCNSE.
- Strong analytical and troubleshooting skills in complex network environments.
- Excellent documentation and communication skills.
- Ability to work independently and lead cross-functional security initiatives.
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