Seth DuCharme, the new Acting US Attorney for the EDNY has been working closely with John Durham for over a year.
Timeline
2020 Jul 10 Appointment of Seth D. DuCharme as Acting United States Attorney for the Eastern District of New York, "experience in prosecuting violent crime, terrorism, and public corruption"
2019 Dec 16 Appointed as Principal Associate Deputy Attorney General
2019 Apr 12 E-mail from DuCharme to Horowitz cc Durham
"Michael, thank you for your time this afternoon and the opportunity for me to explain what John and [redacted] and I are working on."
2019 Apr 3 "John, the AG has made me aware of the [redacted] that you are working on with him, and he asked me to provide you with my support and assistance."
2019 Mar-Dec Served as a Counselor to Attorney General Barr
2018 Mar 1 Appointed EDNY Chief of Criminal Division
Chief of the National Security and Cybercrime section of the U.S. Attorney’s office for the Eastern District of New York (EDNY)
2008 Mar Joined the office to serve in the General Crimes, Violent Crimes, Terrorism and National Security, and Cybercrime sections. DuCharme also worked as a national security cyber specialist and a representative on the department’s Anti-Terrorism Advisory Council.
FOIA docs & sauce
Communications with US Attorney John Durham https://www.justice.gov/oip/foia-library/general_topics/communications_durham_06_19_20/download
MEMORANDUM https://www.justice.gov/oip/foia-library/general_topics/communications_durham_interim_1/download
Ukraine Matter https://www.justice.gov/oip/foia-library/general_topics/ukraine_matter_05_22_20/download
https://www.justice.gov/opa/pr/seth-ducharme-appointed-principal-associate-deputy-attorney-general
https://www.justice.gov/usao-edny/pr/attorney-general-william-p-barr-announces-appointment-seth-d-ducharme-acting-united