Developments such as the 2017 New York Times stories on government-funded UAP research have redirected him towards alien abductions and UAP/UFO phenomena,[16] alongside considerations of their possible connections to the nuclear arms race and AI.

Charles M. Sherover, in his review for the Journal of the History of Philosophy, praised his writing saying "The author brings a mastery of much of the Heidegger corpus and an amazingly extensive familiarity with the secondary literature.

"[17] He analyzed the parallels between Heidegger's philosophy and Mahayana Buddhism, highlighting their joint critique of anthropocentrism and dualism by exploring how both traditions propose alternatives to Western perspectives.

[18] Zimmerman explored Heidegger's perspective on technology, contending that it has led to a reductionist view of beings as mere resources for human use which marked the culmination of Western cultural and philosophical history.

[22] Zimmerman examined the limitations of anthropocentric humanism in addressing environmental crises and advocated for a non-anthropocentric understanding of reality to foster harmonious coexistence with the Earth.

[24] His anthology Environmental Philosophy: From Animal Rights to Radical Ecology presented a curated selection of writings covering topics such as the social construction of nature and eco-phenomenology.

[26] Zimmerman applied the integral theory's framework, including the concept of quadrants and cultural moral development, to address conflicts like proposed forest clear-cutting.

[29] Zimmerman's essay on the rising prominence of alien abduction in popular culture examined the broader societal inclination to suppress knowledge of such phenomena and its implications for scientific inquiry.