Working on the Railroad

In the 1900 Census, Will is enumerated with wife Fannie and son Ernest in Denison, Texas.  His occupation is listed as "Carpenter RR."  Denison was created in 1872 by the Missouri, Kansas & Texas (MKT or "Katy") Railroad and named after one of its vice-presidents.  "In addition to the tracks of the MKT, the town also became a stop on the St. Louis, San Francisco and Texas and the Kansas, Oklahoma and Gulf railroads. Five additional rail lines that connected Denison with other communities in North Texas were chartered between the late 1870s and 1900, including the first interurban electric line between Denison and Sherman in 1896."  "Denison, Texas" in The Handbook of Texas Online by the Texas State Historical Association  So, who knows what railroad employed Will in 1900?

Did Will find work with the railroad before he moved to Denison?  Or did he move to Denison, and then find work?  Questions, questions.