The division of the DOJ in which Rebecca Bond works has nothing to do with what the Dossier involved. They were running it though counterintelligence and her section was Deputy Assistant Attorney General for Civil Rights. She would not have had anything to do with the investigation.
Rahm Emmanuel left the White Hut in 2011 when he was elected Mayor of Chicago and had not been a White Hut staffer or advisor since then.
Here is an article discussing her. She is an Obama holdover.
Elections must carry consequences, or the victorious electorate will question the utility of the process. Yet four Obama holdovers entirely sympathetic to the ideological agenda of the previous administration are still in absolute control of an entire layer of political oversight. There are four deputy assistant attorney general positions at the Civil Rights Division, and all are occupied by committed Obama holdovers. Alberto Ruisanchez and Rebecca Bond were elevated into these slots out of the career ranks, on an acting basis, just days before President Trump’s inauguration. The pair were elevated by the previous administration for their familiarity with the bureaucracy and their skills at slowing down anything President Trump wanted to do. Incredibly, they still haven’t been dislodged and replaced with political appointees who, of course, require no Senate confirmation.
http://thehill.com/opinion/white-house/373051-obama-holdovers-at-the-justice-department-still-run-the-show