Technical Consultancy can help reduce risk, highlight gaps in services/solutions and reduce costs – to name a few benefits. This can be project based and ad-hoc or an on-going level of support to help deliver long term transformations or changes. Understanding your objectives will help to determine the correct type of technical consultancy (just like solicitors have specialties so do IT consultants) and ensure the advice provided is suitable.

https://www.matterofsoftware.com/choosing-a-consultancy-enterprise-architecture-technical-architects/