Customer Onboarding (FIX) Change Consultant6-Month Contract | Up to £500/day | Inside IR35 Hybrid London (2-3 days per week)OverviewA leading electronic trading organisation is delivering a structured connectivity and infrastructure change programme impacting institutional FIX clients.As part of this programme, the business is transitioning client connectivity within a live, regulated trading environment. The team requires an experienced consultant to support onboarding, migration activity and controlled connectivity changes.This is a hands-on technical change delivery role - not a pure change management or PM position. You will be responsible for executing structured FIX onboarding and migration workstreams while operating within a broader change framework.Role Responsibilities Lead Customer Onboarding (FIX) session setup for migrating and new connectionsManage end-to-end connectivity testing, certification and validationExecute structured migration and onboarding workpacksCoordinate controlled customer cutovers and transition planningIdentify and resolve onboarding or connectivity issues proactivelyDraft, update and maintain onboarding documentation, process guides and operating proceduresEnhance migration templates and strengthen repeatable onboarding standardsManage multiple concurrent onboarding initiativesEngage and align stakeholders across US, EU and APAC time zonesProvide structured updates into programme governance forums The Successful Person Will Have Strong ..... full job details .....