Trying to Find Marine Buddies

[AndiMGrant]

I cannot be the only one to get so frustrated by this. Here's the scenario --> I am open to suggestions,PLEASE!

I know this is a LONG SHOT, but I am looking for a United States Marine Corps buddy of my husband's. They served together on Marine Security Guard Duty in Damascus, Syria.
The only information we have on him is the following:
Name: Daniel D. Andresen.
Approximate age: 28
Residence: Home record was Hampton, Virginia.

How can I find this guy? I tried the online white pages and emailed and called everyone I could find. I went to every MSG and Marine Corps and military site and even the Veteran Affairs sites...I searched to no avail and never found a service that would look this guy up for us. We don't even know if he's still Active Duty or not! We do NOT have his social security number! So now what?
:cd:

I'd be ever so grateful for any suggestions you may have.
Many thanks and Semper Fi,

Andi Grant (wife of USMC Sgt Brian Grant)