Postman was the lead or co-investigator on several joint science and engineering working groups exploring the feasibility and science capabilities of future large optical / near infrared telescopes on the ground and in space. He served on the science and technology definition team for the Large Ultraviolet Optical Infrared Surveyor concept (aka LUVOIR), which was proposed to the 2020 Astronomy and Astrophysics Decadal Survey. A modified version of this concept, the Habitable Worlds Observatory, is now being developed by NASA. He was a member of the Hubble Space Telescope Advanced Camera for Surveys investigation team and project scientist for the STScI Digitized Sky Survey program. He has also served on the Council of the American Astronomical Society and on the Committee for the Status of Women in Astronomy. Postman was the Principal Investigator of the HST multi-cycle treasury program Cluster Lensing and Supernova survey with Hubble, a study of dark matter in clusters of galaxies. Postman is also a guest investigator on the New Horizons science team to study the ultraviolet and optical background radiation field as seen from the unique vantage point beyond 45 AU from the Sun.
"STScI Home". https://www.stsci.edu/who-we-are/leadership/marc-postman
Lauer, Tod R.; Postman, Marc; Strauss, Michael A.; Graves, Genevieve J.; Chisari, Nora E. (2014). "Brightest Cluster Galaxies at the Present Epoch". The Astrophysical Journal. 797 (2): 82. arXiv:1407.2260. Bibcode:2014ApJ...797...82L. doi:10.1088/0004-637X/797/2/82. S2CID 118315557. https://iopscience.iop.org/article/10.1088/0004-637X/797/2/82/pdf
Fogarty, Kevin; Postman, Marc; Larson, Rebecca; Donahue, Megan; Moustakas, John (2017). "The Relationship Between Brightest Cluster Galaxy Star Formation and the Intracluster Medium in CLASH". The Astrophysical Journal. 846 (2): 103. arXiv:1701.05903. Bibcode:2017ApJ...846..103F. doi:10.3847/1538-4357/aa82b9. S2CID 119065090. https://doi.org/10.3847%2F1538-4357%2Faa82b9
Fogarty, Kevin; Postman, Marc; Li, Yuan; Dannerbauer, Helmut; Liu, Hauyu Baobab; Donahue, Megan; Ziegler, Bodo; Koekemoer, Anton; Frye, Brenda (2019). "The Dust and Molecular Gas in the Brightest Cluster Galaxy in MACS 1931.8-2635". The Astrophysical Journal. 879 (2): 103. arXiv:1905.01377. Bibcode:2019ApJ...879..103F. doi:10.3847/1538-4357/ab22a4. hdl:10150/633838. S2CID 146120608. https://doi.org/10.3847%2F1538-4357%2Fab22a4
Gültekin, Kayhan; Burke-Spolaor, Sarah; Lauer, Tod R.; w. Lazio, T. Joseph; Moustakas, Leonidas A.; Ogle, Patrick; Postman, Marc (2021). "Chandra Observations of Abell 2261 Brightest Cluster Galaxy, a Candidate Host to a Recoiling Black Hole". The Astrophysical Journal. 906 (1): 48. arXiv:2010.13980. Bibcode:2021ApJ...906...48G. doi:10.3847/1538-4357/abc483. S2CID 225075966. https://doi.org/10.3847%2F1538-4357%2Fabc483
Lauer, Tod R.; Postman, Marc; Weaver, Harold A.; Spencer, John R.; Stern, S. Alan; Buie, Marc W.; Durda, Daniel D.; Lisse, Carey M.; Poppe, A. R.; Binzel, Richard P.; Britt, Daniel T.; Buratti, Bonnie J.; Cheng, Andrew F.; Grundy, W. M.; Horányi, Mihaly; Kavelaars, J. J.; Linscott, Ivan R.; McKinnon, William B.; Moore, Jeffrey M.; Núñez, J. I.; Olkin, Catherine B.; Parker, Joel W.; Porter, Simon B.; Reuter, Dennis C.; Robbins, Stuart J.; Schenk, Paul; Showalter, Mark R.; Singer, Kelsi N.; Verbiscer, Anne J.; Young, Leslie A. (2021). "New Horizons Observations of the Cosmic Optical Background". The Astrophysical Journal. 906 (2): 77. arXiv:2011.03052. Bibcode:2021ApJ...906...77L. doi:10.3847/1538-4357/abc881. hdl:1721.1/133770.2. S2CID 226277978. https://doi.org/10.3847%2F1538-4357%2Fabc881
Lauer, Tod R.; Postman, Marc; Spencer, John R.; Weaver, Harold A.; Stern, S. Alan; Gladstone, G. Randall; Binzel, Richard P.; Britt, Daniel T.; Buie, Marc W.; Buratti, Bonnie J.; Cheng, Andrew F.; Grundy, W. M.; Horányi, Mihaly; Kavelaars, J. J.; Linscott, Ivan R.; Lisse, Carey M.; McKinnon, William B.; McNutt, Ralph L.; Moore, Jeffrey M.; Núñez, J. I.; Olkin, Catherine B.; Parker, Joel W.; Porter, Simon B.; Reuter, Dennis C.; Robbins, Stuart J.; Schenk, Paul M.; Showalter, Mark R.; Singer, Kelsi N.; Verbiscer, Anne. J.; Young, Leslie A. (2022). "Anomalous Flux in the Cosmic Optical Background Detected with New Horizons Observations". The Astrophysical Journal Letters. 927 (1): L8. arXiv:2202.04273. Bibcode:2022ApJ...927L...8L. doi:10.3847/2041-8213/ac573d. S2CID 246680032. https://doi.org/10.3847%2F2041-8213%2Fac573d
"AURA Home". http://www.aura-astronomy.org/news/pastawards.asp
"JPL Small-Body Database Browser: 166746 Marcpostman (2002 TY311)" (2019-02-11 last obs.). Jet Propulsion Laboratory. Retrieved 18 August 2019. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2166746#discovery
"MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 18 August 2019. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
"AAS Fellows". AAS. Retrieved 30 September 2020. https://aas.org/grants-and-prizes/aas-fellows