Online Signing & Online Signature Applications
Here is a long and non-exhaustive list of eSignature apps. We use PandaDoc.
Contractual Agreements
My experience is that executive teams must understand and decide the details of contractual agreements. Your contract reflects the scope you will undertake for your customer (client) and the related risk to which you will expose your company.
You need to decide the terms and conditions (T's & C's) of the deal.