The smaller the number the higher you are. Code 610 is the head of the Earth Sciences Division. Jim Hansen is head of code 611. Theon was head of 613.2. Not only was he not even 'in line' with Hansen he's lower in the hierarchy. Supervisor, not. Theon apparently spent his entire career on TRMM while Hansen became the premier expert on climate change. A Google Scholar search finds no recent papers.
Updated from here.
H/t Daily Kos.