What type of tech consulting? Strategy/ Architecture? Delivery management? Implementation? Each of these have their own profiles/approaches.

For the former, I'd bill fixed price, fixed outcome - half up front, half on delivery. This is the highest margin work buts it's bitty.

For the rest, a flavour of t&m depending on duration of the engagement.

Testimonials are great, but get some case studies together also and make sure your pitch deck is tight.

There is a lot more I could say, ask in the comments if you wanna talk - happy to oblige.

Source: I did tech consulting and advisory for investment banks and hedge funds for 20 years.