Frank Steen is a 35 year old human male who used to do research on Prosperity Station. He was found in a sealed, unmarked bioplastic crate aboard the Kolibri.
Since Frank did not know who put him in that crate or what those people were going to do with him he went into hiding at Orchard Enterprises and took on the alias of 'Fringe'. As Frank Steen is a skilled medic and technician Rick has offered him a permanent job. By now Frank has found out and dealt with his kidnappers.
When the group purchased Orchard Enterprises from Rick Orchard he got the job of CFO.