ION · 7 hours ago
Senior Network Engineer
Trumbull, CT
Full-time
Onsite
Senior Level
6+ years expION is a rapidly expanding group providing trading and workflow automation software, analytics, and consulting services. The Senior Network Engineer will support and maintain ION's regional and global infrastructure while managing network deployment, maintenance, and troubleshooting in a complex environment.
AccountingAsset ManagementFinanceFinancial ServicesSoftware
Hiring Manager
Bhavansh Sharma
Responsibilities
Deploy network infrastructure following established design standards
Perform general maintenance on routers, switches and firewalls
Troubleshoot issues in a complex Internet/Extranet environment
Interact professionally with customers and vendors to determine design requirements
Provide Level 1 through Level 4 network support
Participate in on-call rotation
Provide occasional 1st level server support such as racking and disk swaps
Occasional travel to remote Fidessa Data Centres in the Chicago Area
International Travel to Canada, Mexico, Chile and Brazil (2 weeks a year)
Qualification
Required
6+ years of network engineering experience in an enterprise environment
Experience configuring Arista routers/switches in both traditional backbone/access layers as well as spine and leaf
Proficient configuring Juniper routers, switches and firewalls via command line interface
Enterprise experience with firewalls such as Checkpoint, Juniper SRX, Palo Alto
In-Depth knowledge of routing protocols: BGP, OSPF, EIGRP, MPLS, PIM, RIP
In-Depth knowledge of Layer2 protocols: STP, 802.1q, VPC, LACP
Experience in hybrid cloud integration and cloud networking
Must have knowledge of traffic engineering and QoS
Proficient with configuring and troubleshooting IPSEC VPNs
Proficient with network packet capture and analysis
Proficient with creating network diagrams with MS Visio
A thorough understanding of TCP/IP
Experience working with Network Monitoring Systems e.g. PRTG, Nagios
Clear, accurate and concise written and verbal communication skills
Strong analytical skills with good attention to detail
Good time management and planning skills
Demonstrated technical leadership skills
Organized and able to use initiative to prioritize work and able to adapt to changing workload priorities
Takes ownership of delegated tasks and sees things through to completion
Enthusiastic and highly motivated
Calmness under pressure and ability to remain focused on service
Ability to create and maintain strong working relationships
Maintain detailed technical documentation, including network diagrams, configuration records, and knowledgebase content
Must have an automobile and be able to drive to Trumbull, CT office
Preferred
Arista ACE-L3, CCIE, or demonstrated equivalent experience
Experience with network automation a plus
Experience with automation: Ansible, Python, etc a plus
Fintech, finance, banking experience is a huge plus
Company
ION
ION Group provides solutions for electronic trading, position management, pricing, risk management, and downstream processing for clients.
10001+ employees
H1B Sponsorship
ION has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (2)
2024 (1)
2022 (2)
2021 (4)
Funding
Current Stage
Late StageLeadership Team
Rich Grossi
Chief Executive Officer, ION Corporates
Sandra Timmoney
Chief of Staff to the CEO, Corporates
Recent News
2025-12-19
2025-12-04
2025-12-03
Company data provided by crunchbase