Infrastructure Senior Tech Analyst

Citi Markets Technology are seeking a highly motivated IT professional to join our Global Markets Platform team located in Mississauga. This is an opportunity to join the global team providing technology services across our suite of Equities electronic trading applications. This role will involve collaboration with electronic-trading platforms and infrastructure dealing with a wide range of teams including Traders, Application Developers, Product Owners, and Engineering.

Engineering the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech.

Markets Technology at Citi is undertaking a bold, multi‑year transformation to build a best‑in‑class global platform across execution, prime, clearing and cross‑products. We are re‑engineering our technology estate to achieve world‑leading performance and resiliency, enabling new capabilities in advanced execution, global market connectivity, and modernized post‑trade, clearing and margin processes. Our ambition is to deliver a seamlessly integrated, highly automated platform that drives outstanding client outcomes and accelerates growth across our global franchise. As part of the team, you’ll collaborate closely with high‑caliber engineers and deeply engaged business and product partners – working together to define and deliver the next generation of Markets technology at Citi.

Role Overview

The Infrastructure Senior Tech Analyst is a senior‑level position responsible for the successful execution of complex, strategic, enterprise‑wide technology initiatives critical to Citi’s Markets business growth, regulatory compliance, operational efficiency and business outcomes.

Interface with Citi’s Markets business, technology application teams and clients/vendors, understand functional business and technical connectivity requirements, translate the business/application/technical connectivity requirements into actionable engineering change requests for implementation by Network Engineering, Firewall & Proxy Engineering, Load Balancer Engineering and System Administrators/Engineering.

Responsibilities

• Global Markets Applications Infrastructure Network Design & Implementation
  • Design and implement scalable, secure, and highly available network architectures.
  • Plan, configure, and deploy network hardware (routers, switches, firewalls, load balancers, wireless access points) from various vendors (e.g., Cisco, Juniper, Palo Alto, F5).
  • Develop and maintain comprehensive network documentation, including diagrams, configurations, and procedures.
• Global Markets Applications Connectivity Troubleshooting & Support
  • Diagnose and resolve complex network issues, including connectivity problems, performance degradation, and security incidents.
  • Provide expert‑level support for all network‑related problems, collaborating with other IT teams as needed.
  • Participate in after‑hours support for network change activities.
• Global Markets Applications Connectivity Network Security
  • Implement and manage network security measures, including firewalls, VPNs, and access control lists (ACLs).
  • Ensure compliance with organizational security policies, published standards, and industry best practices.
• Global Markets Applications Connectivity Automation & Scripting
  • Identify opportunities for network automation to improve efficiency and reduce manual errors.
  • Develop and implement scripts (e.g., Python, Ansible) for network configuration, monitoring, and management tasks.
• Global Markets Platforms Collaboration & Mentorship
  • Work closely with other infrastructure teams (server, virtualization, cloud) to ensure seamless integration and operation of systems.
  • Participate in project planning and provide technical expertise for new initiatives.

Qualifications

Required Qualifications

• Bachelor’s degree in Computer Science, Information Technology, or a related field, or equivalent practical experience.
• Experience in Capital Markets Low Latency Network Infrastructure workflows will be highly relevant to this role.
• 5+ years of experience in network engineering, with a focus on enterprise‑level networks.
• Strong proficiency in routing protocols (BGP, OSPF, EIGRP), switching technologies (VLANs, STP, HSRP/VRRP), and VPN technologies (IPSec, SSL VPN).
• Solid understanding of network security principles and best practices.
• Familiarity with network virtualization technologies (e.g., SD‑WAN, NSX).
• Excellent problem‑solving, analytical, and communication skills.

Preferred Qualifications

• Relevant industry certifications (e.g., CCNP, JNCIP, CCNA, PCNSE).
• Experience with cloud networking (AWS VPC, Azure VNet, Google Cloud Networking).
• Proficiency in scripting and automation (e.g., Python, Ansible, Terraform).
• Experience with load balancers (e.g., F5 BIG‑IP, A10 Networks).
• Experience in a regulated industry (e.g., finance, healthcare).

Key Skills

• Technical Expertise – TCP/IP, BGP, OSPF, EIGRP, VLANs, STP, MPLS, DNS, DHCP, SNMP, QoS, IPSec, SSL VPN, SD‑WAN.
• Hardware – Cisco (Routers, Switches, Meraki), Juniper, Palo Alto Networks, Fortinet, F5.
• Security – Firewalls, IDS/IPS, VPN, NAC, SIEM.
• Tools – Wireshark, Nmap, Traceroute, Ping, Network Management Systems.
• Operating Systems – Linux, Windows.
• Soft Skills – Critical Thinking, Problem Solving, Communication (Verbal & Written), Teamwork, Adaptability, Mentorship.

Flexibility to work in shifts between 12PM - 10PM EST and weekend support.

This job description provides a high‑level review of the types of work performed. Other job‑related duties may be assigned as required.

Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.