I have, luckily, read a personal account of the logistical assistance that a USAID contractor had [0]. Doug Muir wrote about improving customs practices in Rwanda and training locals to take over for him. Improving, in this case, means standardizing inspections of trade goods to decrease holding time.
[0] https://crookedtimber.org/2025/03/08/usaid-my-next-to-last-p...