[nunez]

Deloitte is a very, very large company. They offer lots of professional services aside from accounting services (their core competency).

[j45]

I am aware they are into professional services.

Many accountant-consulting firms began and keep majority of their services are finance/accounting/tax based.

Deloitte in specific has added other "consulting" unit largely in the past 10-15 years, after 150 years of primarily accounting. This is pretty common with other accounting firms too, nothing personal against Deloitte (have known folks who have worked for them).

https://en.wikipedia.org/wiki/Deloitte