As I have listened to the material, it needs good EQ (recovering proper male voice), dehissing and probably multiband compression at the end.
I'm not sure it is possible to do it in 100% like in the Right Audio Sample, it just sounds like better mic, preamp and whole recording chain, but big improvement can be done.
If you pick me I will send the material in 24h back and we will have 2 days for discussion and minor improvement.
Regards,
Robert