The part of the sentence "colleague by" is not correct and usable in written English.
You would have to use some other words to clarify what you are trying to communicate. For example: "My colleague and I work closely together."
Germany's foreign minister, Guido Westerwelle, followed his French colleague by angrily summoning the American ambassador in Berlin.
If you want to compliment a colleague, by all means tell her what great work she has been doing.
The drivers cheated the sighted colleague by taking long routes much more often than they cheated the blind one, even though she would have been easier to mislead.
— papers, responses, essays, I don't know quite what they are meant to . . . the topic given to you by my colleague, by . . .
A court bailiff gazed out the window and gestured to a colleague by slapping a fist into an open hand, miming what was happening outside.
The researchers found that their software was able to predict a study participant's personality more accurately than a work colleague by analysing just 10 likes.
To extradite Mr Lugovoi or try him at home would be kowtowing to the West (and betraying a KGB ex-colleague); by doing nothing, he may seem to be protecting a murder suspect.The Russian leader may feel he has little to lose by antagonising the West.
Einstein horrified his colleagues by enjoying his vast celebrity.
A year later, he angered his former colleagues by wooing away Mr. Williams and Mr. Menchel.
Photograph of Barton Gellman and his Washington Post colleagues by J. Scott Applewhite/AP.
Here Brown has been ahead of his colleagues by proposing a $100bn-a-year 100bn-a-year 100bn-a-year fund
