1. He met the age requirement on the entry date 7/1/15.
2. Having worked 1,000 hours in the plan year 4/1/14 - 3/31/15, he met the service requirement no later than 3/31/15 (depending on how the plan is worded, it could have been prior to the last day of the plan year).
In any event, as of the entry date 7/1/15, he had met the age and service requirements and would have become a participant on that date.
If he were older and met the age requirement some time in 2013 or earlier, he would (depending on the exact language of the plan) probably not be able to enter until 4/1/15 because that would be the earliest quarterly entry date on which he would have met both the age and service requirements.