Pros

Best Clients in all verticals
Processes in Software Development
Client Interaction
Large and Global Presence
Growth opportunities at entry to mid level

Cons

Possibility of getting lost in large employee base
Getting struck to assignments, projects, clients - inability to switch projects, technologies, clients (depends on project to project)
Remuneration could be better

Advice to Senior Management

Move employees across globe and accounts to transfer best practices and skills.
Focus on growth with present employees - there is lot which can be done