The 36-year-old midfielder will join up with his new club after taking a two-week break following the end of Manchester City's season.
Lampard, 36, is currently taking a two-week break after spending the 2014-15 season with Manchester City, where he scored eight goals in 38 total appearances, before linking up with sister club NYCFC later this month.
The former Chelsea midfielder will not be eligible to feature for the MLS expansion franchise until the league’s summer transfer window opens on July 8, with his debut potentially coming four days later at home to Toronto FC, but Kreis is looking forward to having him around the team in the meantime.
“He’s going to have a two-week break and then he’s going to come here and train,” said the ex-Real Salt Lake boss. “So we’ll have him for three, three-and-a-half, maybe four weeks before he’ll be available to join us after our summer transfer window opens [on July 8].
“I think it’s going to be really important for us and for him.”
Kreis also revealed that he and Lampard have had numerous discussions ahead of his arrival in New York and added that the former England international has been keeping close tabs on events at the club.
“We’ve kept in communication because obviously he’s going to be an important player for us, a big player for us,” Kreis continued. “It’s been interesting because he’s been watching all the games.”
NYCFC will no doubt be relieved when the time comes that Lampard can contribute on the pitch, having gotten off to a slow start to their inaugural campaign.
The club sit bottom of the Eastern Conference after 13 games, having recorded just one win, five draws and seven defeats, while their 10 goals scored are also the second-lowest amount in the league.
With captain David Villa failing to produce to expectations levels while starved of service up top, Lampard’s addition should help ease some of the problems, although whether it will be enough to get them into the play-off picture is debatable.