Senior Network Engineer, Director – Critical Infrastructure & Patch Deployment at Morgan Stanley, Tokyo

Senior Network Engineer, Director – Critical Infrastructure & Patch Deployment at Morgan Stanley in Tokyo. Full-time. Apply with swipeandhired.

We are seeking a highly skilled and hands-on Senior Network Engineer to join our Enterprise Network Services team. This role is responsible for deploying, and supporting critical network infrastructure across both internal enterprise environments and external customer-facing platforms.
The ideal candidate will have extensive experience planning and executing critical network security and infrastructure patch rollouts in fast-paced, highly regulated, and uptime-sensitive environments. The role requires deep expertise in routing, switching, data center networking, internet connectivity, network security, and production change management.
The successful candidate will demonstrate a strong track record of executing complex infrastructure changes with minimal risk, maintaining network resiliency, and supporting business-critical services operating in 24x7 global environments.

Key Responsibilities

• Implement, and support enterprise-scale network infrastructure across data centers, cloud, and campus environments.

• Provide Tier-3 support and technical leadership during major incidents and escalations.

• Develop and maintain network standards, update documentation, and engineering procedures.

• Lead planning, testing, risk assessment, and deployment of critical security and infrastructure patches across production environments.

• Drive execution of complex maintenance activities with minimal customer or business impact.

• Coordinate maintenance windows, rollback plans, validation testing, and post-implementation reviews.

• Ensure compliance with security, audit, and regulatory requirements through timely remediation of vulnerabilities.

• Partner with Security, Infrastructure, Application, and Operations teams to prioritize and execute remediation activities.

• Coordinate end-to-end remediation activities including maintenance windows and pre/post validations across multiple stakeholders, including business application owners, multiple infrastructure teams (Unix, Load Balancer, Firewall etc), security teams, and all relevant third-party vendors (Cisco/Arista etc).

• Maintain high availability and resilience of business-critical services.

• Monitor network performance and proactively identify risks before they impact production.

• Develop automation solutions using Python, Ansible, or similar tools to improve operational and deployment efficiency.

• Standardize deployment procedures and reduce manual intervention through automation.

• Drive operational excellence through continuous process improvement and infrastructure optimization.

Required Technical Skills
Strong hands-on experience with:

• Cloud observability skill set and cloud native tools like CloudWatch, APIs, VPC reachability analyzer, Network Watcher etc.

• Leaf-Spine Architectures across Cisco and Arista Platforms

• Ansible, Python, Terraform, Github and Jira expertise along with network knowledge on various protocols like BGP/OSPF etc.

Required Experience

• 8+ years of enterprise network engineering experience.

• Proven experience executing critical security patching and production network upgrades in large-scale environments.

• Strong experience supporting both internal infrastructure and internet-facing production services.

• Experience operating in financial services, trading, telecommunications, cloud, or other mission-critical environments.

• Demonstrated ability to perform complex maintenance and migration activities during scheduled change windows.

• Strong understanding of network resiliency, high availability, and disaster recovery principles.

Preferred Qualifications

• CCNP, CCIE, or equivalent industry certifications.

• Knowledge of network automation frameworks.

• Experience with large-scale global data center environments.

• Familiarity with agile delivery and DevOps methodologies.

Personal Attributes

• Strong ownership and accountability.

• Calm and decisive under pressure.

• Excellent troubleshooting and analytical skills.

• Strong communication and stakeholder management capabilities.

• Ability to operate effectively in fast-paced, highly dynamic production environments.

• Willingness to support weekend implementations, emergency changes, and critical incident response when required.

What Success Looks Like

• Timely rollout of critical patches with zero unplanned outages.

• Improved network reliability and security posture.

• Reduced operational risk through automation and standardization.

• Effective execution of large-scale infrastructure changes across global environments.

• Strong partnership with operations, security, and application teams to maintain resilient business services.

WHAT YOU CAN EXPECT FROM MORGAN STANLEY:

At Morgan Stanley, we raise, manage and allocate capital for our clients – helping them reach their goals. We do it in a way that’s differentiated – and we’ve done that for 90 years. Our values - putting clients first, doing the right thing, leading with exceptional ideas, committing to diversity and inclusion, and giving back - aren’t just beliefs, they guide the decisions we make every day to do what's best for our clients, communities and more than 80,000 employees in 1,200 offices across 42 countries. At Morgan Stanley, you’ll find an opportunity to work alongside the best and the brightest, in an environment where you are supported and empowered. Our teams are relentless collaborators and creative thinkers, fueled by their diverse backgrounds and experiences. We are proud to support our employees and their families at every point along their work-life journey, offering some of the most attractive and comprehensive employee benefits and perks in the industry. There’s also ample opportunity to move about the business for those who show passion and grit in their work.

To learn more about our offices across the globe, please copy and paste https://www.morganstanley.com/about-us/global-offices​ into your browser.

Morgan Stanley is an equal opportunity employer committed to building and maintaining a workforce that is diverse in experience and background. Our recruiting efforts reflect our strong commitment to a culture of inclusion, where individuals are hired, developed, and advanced based on their skills and talents.

Our workforce reflects a broad cross-section of the global communities in which we operate, bringing a variety of backgrounds, talents, perspectives, and experiences.

For more information, please visit: https://www.morganstanley.com/people-opportunities/eeo .