I don't know about a formula, but this is what I would do.
get the tables that relate to the technicians and the time logs, group by the technician first then the time log, sorting the time log in ascending order.
suppress the details and the technician group header, then just print the technician and the time log info in the time log group header (as it is the first record of the group).
you will probably have to filter out the records that are not for the date in question, but this is a general plan.
HTH