Network Segmentation and Security Engineer

Innovation Hub Overview 

Jefferies is creating a Technology Innovation Hub in Pune, a greenfield opportunity to build the systems that power global markets. As our first India technology center, this hub brings together hands on builders who engineer the platforms behind Jefferies’ growth across capital markets, investment banking, and institutional securities. We’re scaling toward an elite team of 500 engineers while maintaining the agility, ownership, and meritocratic spirit that defines Jefferies. From cloud and data to AI, risk, and core business technologies, teams in Pune will lead high impact work with a global mandate.

 

IT Security Technology

Jefferies’ IT Security Technology / Global Information Security (GIS) team protects the firm’s critical systems, sensitive information, and global operations against evolving cyber threats. GIS partners with Technology, Operations, Corporate functions, and the Business to embed security into day-to-day operations while supporting productivity, regulatory compliance, and operational resilience. GIS balances strong controls with efficiency and operates globally across the US, EMEA, and APAC to provide round-the-clock coverage

 

About the Role

Jefferies is seeking a Network Segmentation and Security Engineer to join the Information Security team. This is a hands-on engineering role with accountability for researching, designing, implementing, and supporting network security solutions with a strong focus on micro-segmentation. You will work closely with engineering, infrastructure, network, and application teams globally to align security requirements, influence technical decisions, and communicate strategy and architecture while helping protect the firm’s technology assets.

The ideal candidate has strong experience with Illumio and micro-segmentation, along with solid exposure to network security controls such as firewall policy management, WAF, IPS, NDR, and related platforms. We value individuals who are highly motivated to learn, can execute with minimal supervision, and can effectively prioritize and communicate complex issues. 

 

Key Responsibilities

• Architect, deploy, and manage Jefferies’ global Network Segmentation (Micro-segmentation) program leveraging Illumio and supporting workflow integrations (e.g., ServiceNow). 
• Partner with Network Security Engineering on segmentation architecture, deployment strategy, and ongoing operational management. 
• Implement micro-segmentation policy for applications and endpoints, ensuring secure, scalable designs aligned with business needs. 
• Troubleshoot and resolve escalated network/security issues with urgency, applying strong prioritization and root-cause analysis. 
• Support and integrate a broader network security control environment, including: 
  • Firewall policy management 
  • WAF, IPS, NDR 
  • Network Access Control (NAC) / ISE 
  • Web Browser Isolation 
  • Network Security Policy Management and related platforms
• Collaborate with Network Engineering/Operations and Security Engineering/Operations to embed security into network design and day-to-day operations. 
• Engage Infrastructure and Application teams to align network security policies with application requirements and enterprise standards. 
• Participate in an on-call / escalation model and respond to urgent incidents as needed.

 

Required Qualifications

• Significant hands-on experience with micro-segmentation, specifically Illumio (deployment, policy design, operations, troubleshooting). 
• Strong foundation in networking and firewalling concepts and operational best practices. 
• Proficiency with network troubleshooting and visibility tools (e.g., tcpdump, Wireshark, syslog, NetFlow, packet captures). 
• Solid understanding of security fundamentals (e.g., intrusion detection concepts, incident response, encryption basics, network access controls, threat management, security controls). 
• Strong knowledge of OSI model, subnetting, and CIDR notation. 
• Ability to manage multiple priorities and adapt to changing business needs in a fast-paced environment. 
• Experience working effectively with global, cross-functional teams across time zones. 
• Self-starter mindset with the ability to take ownership, mentor others, and drive issues to closure.

 

Preferred Qualifications

• Hands-on experience deploying and operating an Illumio environment at scale. 
• Relevant certifications such as Illumio Core Associate/Specialist/Expert (SaaS or On-Prem), CCNA/CCNP, Security+, CCNA Security, or CISSP. 
• Exposure to additional security/network platforms such as Check Point, Fortinet, Proofpoint, Cloudflare, F5 Silverline, SSL certificate management, or other Zero Trust/SASE products. 
• Scripting experience (especially Python) is a plus.

 

At Jefferies, we believe that diversity fosters creativity, innovation and thought leadership through the infusion of new ideas and perspectives. We have made a commitment to building a culture that provides opportunities for all employees regardless of our differences and supports a workforce that is reflective of the communities where we work and live. As a result, we are able to pool our collective insights and intelligence to provide fresh and innovative thinking for our clients.

Jefferies is an equal employment opportunity employer, and takes affirmative action to ensure that all qualified applicants will receive consideration for employment without regard to race, creed, color, national origin, ancestry, religion, gender, pregnancy, age, physical or mental disability, marital status, sexual orientation, gender identity or expression, veteran or military status, genetic information, reproductive health decisions, or any other factor protected by applicable law. We are committed to hiring the most qualified applicants and complying with all federal, state, and local equal employment opportunity laws. As part of this commitment, Jefferies will extend reasonable accommodations to individuals with disabilities, as required by applicable law.

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