Senior Principal Network Engineer - Global WAN & Automation

London Stock Exchange Group (LSEG) in St. Louis seeks a principal network engineer to support and optimize the global network, with emphasis on Cisco WAN, BGP, OSPF, and multicast. You will design, implement, and document network solutions, lead upgrades, and mentor peers. The role requires strong English communication, a technical degree, and 5+ years WAN experience in finance or SP environments; CCIE desirable.