Also, I think you'd probably say one of the following (or some variation of such)
会社へ行くとき
通勤中
通勤していたとき
会社に向かていたとき
通勤途中
rather than 会社に走りながら. Kind of sounds like you were running to work.
And, just to be pedantic, you probably don't need the 「私は」 as its implied that you are the one who was going to work and doing the "seeing". Not that including it makes the sentence grammatically incorrect, mind you, it just seems a bit superfluous.