Jason Manumaleuna

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RCG Division of Marex Spectron-337x80.jpg

Jason Manumaleuna
Jason Manumaleuna 2017.jpg
Occupation Chief Executive Officer
Employer RCG Division of Marex Spectron
Location Chicago, Il

Jason Manumaleuna is the CEO of the RCG Division of Marex Spectron. He was previously president at Rosenthal Collins Group (RCG), which Marex acquired in February 2019. He has worked in the futures industry for almost 20 years.[1] He was promoted to president in February 2018 after having been RCG's executive vice president & chief financial officer. He joined RCG in 2015 in that role after spending more than seven years at R.J. O'Brien & Associates.[2]


Manumaleuna began his career as an auditor at the Chicago Mercantile Exchange in 1997. He left the CME in 1998 to work as the controller for LFG, LLC, which later became a division of Refco. In 2005, he left Refco and joined Calyon Financial as assistant controller and was promoted to controller within a year. He later joined MF Global and worked in their internal audit department, moving to R.J. O’Brien & Associates in 2008, and becoming RJO's chief financial officer in 2010.[3]


He earned a Bachelor of Arts in Accounting from the University of Illinois at Chicago.


  1. Management Team. RCG.
  2. Rosenthal Collins Group Promotes Manumaleuna To President, Mackey To Deputy President. PR Newswire.
  3. R.J.O'Brien Promotes Jason Manumaleuna to Chief Financial Officer. RJO.