Signature Options

We are a Construction Co. and hire people in very rural areas, up to 20 a day, across the US doing pipeline work.  Before they start we need them to fill out a bunch of paperwork.   We'd like to use e-sign and have in the instances the employee has email and means to receive the email on site but half don't.   Our site superintendents will have an IPad or computer on site but sending it to our employee's email  and having the future employee sign the documents doesn't seem like the right thing to do.  This paperwork will have SS#'s and will need to be legally binding.  Are there options to set up something on the web for the new employee to log in and sign the docs or have them on our website?  Looking for ideas on how we can do this.  Thanks!