You have set up an interesting premise. I'm not sure I like the date/time headings though. I think they can get tiring if used too much.One thought, the second entry contradicts itself. The character (for whom we do not have a name or anything) says they can't get TSE to send another walker because they've spent too much time on this project, then the character is going to ask them anyway.
This feels to me like it is free form thought which is fine, but I don't think it's necessary, or even advisable this early in the story. Why can't the character just say "I'm gong to ask for another Walker. They'll probably say no, but I'll ask anyway." and have that be the whole second entry? It's shorter and still gets the same point (I think) across.
Overall I found it interesting I would have kept reading.