He is just a desk jockey who loves his paperwork.
desk jockey
idiomOne who spends their time seated at a desk; especially one who is more concerned with procedure, paperwork, or administration than with an ultimate goal or a practical consequence.
Origin
disputed originBlend of desk + disc jockey.
After years of working in the field, he became a desk jockey who only cares about company policies.
The veteran engineer grew frustrated with the desk jockey in the office who prioritized filing reports over solving the actual mechanical failure.