YOU SAID:
彼を見送りに駅に行ってきたところだ。
INTO JAPANESE
彼を見送りに駅に行ってきたところだ。
BACK INTO ENGLISH
I have just been to the station to see him off.
INTO JAPANESE
私は彼を見送りに駅に行ったところです。
BACK INTO ENGLISH
I have just been to the station to see him off.
That didn't even make that much sense in English.