Many commercial buildings hide a bigger problem than broken equipment: unclear ownership of shared infrastructure — telecom closets, riser cabling, power feeds, and automation touchpoints that sit between landlords, tenants, contractors, and service providers. In this episode Alex Morgan interviews Michael Harrington about the messy operational reality of “shared stacks.” We unpack root causes (contract silos, short-term buildout incentives, undocumented handoffs), pragmatic governance models, and the tradeoffs between centralized control and tenant autonomy. Michael offers anonymized, real-world examples where responsibility gaps produced real outages and cost overruns, then walks through a practical checklist teams can use to catalogue shared assets, prioritize risky interfaces, and bake durable responsibilities into fit-outs and vendor scopes. Listeners will get a clear framework to reduce coordination failures, protect tenant uptime, and simplify capital and operational planning across properties.