Greystar 401k phone number. regarding their 401k plan via phone, please call 469-425-2196. Contact support here. Greystar HR Number Greystar HR Number where you can talk to a real person at Greystar human resources with regards to jobs, open positions, human resources, benefits, employment verification and employee related matters is 713-953-4500. Contact us here They should be able to direct you to the plan administrator or provide details about your old 401 (k). To login to your GREYSTAR 401 (K) PLAN account, visit the following website. . p. We’ll be in touch shortly! Greystar Management Services, L. Greystar human resources address is 10375 Richmond Avenue, Houston, Texas 77042, United States. Contact Greystar for customer support and assistance. ekio jfhwqjy me mpv qi2bn8w vd6l cysby fkmc gju m0fvdu