He's "former" BlackRock, which is sort of like being a former spook. He "left" to start this "Phinance Technologies" thing, which from its website appears to do nothing but present antivax "data" in an obtuse, nearly incomprehensible manner. I don't have the math to know if it's pure schizoposting or not.
I don't know how his method of calculating excess death rates compares to standard practices, but I've got enough of a math background to tell it isn't just schizoposting. Would be happy to explain any terminology / concepts in the .PDF.
The gist of the report is: here's a bunch of different ways of calculating excess deaths.
Method 1) Find the average total number over the last 5 years, and subtract that amount from every year. The difference is the number of average deaths
Method 2a) Find the death rate per age group -- divide the number of deaths by the number of people, in each group -- and compare 2020 and 2021 to 2019, the last "normal" year. Tends to give a more stable pattern year-by-year since we are controlling for fluctuations in population size (can be seen by comparing Figures 3 and 4)
Method 2b,c) The death rate as calculated in Method 2a) tends to gradually decline year-over-year (seen in Figure 4 again), so the author introduces a compensating factor. In method b it's exponential decay, in method b it's linear decay. Incorporating this factor makes excess rates a bit higher
Overall, reasonable stuff and barely ideological, aside from various comments along the lines of "you would think that these excess deaths would have gone down after vaccines were introduced, but they didn't, how strange"
Haven't read through everything on their site but I don't see anything nuts there either, all their data is sourced (although I haven't double-checked to make sure it's been reported accurately) and the math seems fine.
EDIT: The weakest thing I'm seeing so far is that they (seem to) use the total excess death rate from mid-2021 onwards as their upper bound for vaccine mortality, which is logically valid, but is a rhetorical sleight-of-hand, one gets a sense that they expect you to ignore the "upper bound" part. They do a similar thing for disabilities (data they got from an outside source), blaming the entire rise in disabilities on the vaccine rollout, disregarding other potential explanations like long covid or climate change
