Network Engineer

Transaction Network Services (TNS); Illinois; On-site; USD 90,000 - 100,000; Full time

Benefits offered by this job

Medical and dental coverage

Life insurance

Paid holidays and vacations

401K plan with company match

Job summary

Transaction Network Services (TNS) is seeking a Network Engineer to join their Financial Markets Network Engineering team in Illinois. This position involves supporting real-time trading and market data connectivity across global networks. Candidates should have 3+ years experience with Cisco, Juniper, and Arista, strong Layer-2 and Layer-3 knowledge, and skills in multicast and packet capture. The role offers an estimated salary of $90,000–$100,000 and comprehensive benefits, fostering a culture of personal growth and technology passion.

Qualifications

• 3+ years of experience supporting global IP networks.
• Hands-on experience with Cisco, Juniper, and Arista platforms.
• Strong Layer-2 knowledge (VLANs, trunking, STP, LACP).
• Strong Layer-3 fundamentals (BGP basics, OSPF/IS-IS concepts).
• NAT fundamentals and troubleshooting experience.
• Multicast fundamentals (IGMP, PIM).
• Packet capture and analysis skills.
• Strong written and verbal communication skills.

Responsibilities

• Support add/move/change (MAC) activities across production financial-markets networks.
• Configure and troubleshoot Layer-2 and Layer-3 network services.
• Assist with BGP, OSPF, and IS-IS routing changes and troubleshooting.
• Support NAT configuration and fault isolation.
• Assist with IP multicast for market data distribution.
• Perform packet capture and traffic analysis.
• Assist with Layer-1 troubleshooting.
• Follow disciplined change, documentation, and operational processes.
• Work with senior engineers on automation-enabled configuration.

Skills

Global IP networks support

Cisco platforms

Juniper platforms

Layer-2 knowledge

Layer-3 fundamentals

NAT troubleshooting

Multicast knowledge

Packet capture skills

Communication skills

Education

CCNA or CCNP

NCIA or JNCIP

Job description

Overview

Transaction Network Services (TNS) provides mission‑critical connectivity solutions to global financial markets, enabling firms to access exchanges, market data, and counterparties with high availability and operational excellence.

We are seeking a Network Engineer to join our Financial Markets Network Engineering team. This role supports real‑time trading and market data connectivity across highly available global networks. The position provides strong exposure to routing, switching, multicast, automation, and packet‑level troubleshooting in production trading environments.

Responsibilities

• Support add/move/change (MAC) activities across production financial‑markets networks
• Configure and troubleshoot Layer‑2 and Layer‑3 network services
• Assist with BGP, OSPF, and IS‑IS routing changes and troubleshooting
• Support NAT configuration and fault isolation (static and dynamic NAT)
• Assist with IP multicast (IGMP, PIM) used for market data distribution
• Perform packet capture and traffic analysis (tcpdump, Wireshark or equivalent)
• Assist with Layer‑1 troubleshooting including physical connectivity and latency‑sensitive paths
• Follow disciplined change, documentation, and operational processes
• Work with senior engineers on automation‑enabled configuration and validation

NETDEVOPS & AUTOMATION

• Exposure to network–as‑code practices using structured data (JSON/YAML)
• Assist with templated configuration and automation workflows (e.g., Jinja2, Ansible)
• Follow Git‑based version control and peer‑review workflows for network changes

Compensation & Benefits

For this role, the estimated annual compensation range is $90,000–$100,000. TNS offers a competitive benefit package including medical and dental coverage, life insurance, paid holidays and vacations, and a 401K plan with company match.

Qualifications

Required Skills & Experience

• 3+ years of experience supporting global IP networks
• Hands‑on experience with Cisco, Juniper, and Arista platforms
• Strong Layer‑2 knowledge (VLANs, trunking, STP, LACP)
• Strong Layer‑3 fundamentals (BGP basics, OSPF/IS‑IS concepts)
• NAT fundamentals and troubleshooting experience
• Multicast fundamentals (IGMP, PIM)
• Packet capture and analysis skills
• Strong written and verbal communication skills

Certifications

• CCNA or CCNP
• NCIA or JNCIP

TNS is an equal opportunity employer. Immigration sponsorship (i.e., H1‑B visa, F‑1visa (OPT)), TN visa or any other non‑immigrant status) is not currently available for this position.

If you are passionate about technology, love personal growth and opportunity, come see what TNS is all about!

TNS evaluates qualified applicants without regard to race, color, religion, gender, national origin, age, sexual orientation, gender identity or expression, protected veteran status, disability/handicap status or any other legally protected characteristic.