Jeffrey Siegal is a Partner at MK Partners LLC. Previously he was a Partner and founder of Metalmark Capital, a leading private equity investment firm that that focuses on the energy, healthcare, and industrials sectors and whose principals managed $7 billion of equity capital across several funds. Prior to joining Metalmark Capital and its predecessor organizations in 2001, Jeff served as the Chief Financial Officer of @stake, a leading cyber security engineering firm, and as a Senior Managing Director at Castle Harlan, a private equity investment firm.

Prior to entering the private sector, Jeff was a Captain in the U.S. Air Force. He served as a program manager for the Worldwide Military Command and Control System, one of the largest command, control, and communications modernization programs in the Department of Defense which at the time was a DSARC level program.

Jeff is currently a director of the McChrystal Group (www.mcchrystalgroup.com) and was previously a director of Kissner Milling Company (www.kissner.com), Schafer Corporation (www.schafercorp.com), WorldStrides (www.worldstrides.com), HDT Global (www.hdtglobal.com), Airborne Systems (www.airborne-sys.com), Asynchrony Solutions (www.asynchrony.com), INDSPEC Chemical Corporation (www.indspec-chem.com), Melissa & Doug (www.melissaanddoug.com), SouthernCare (southerncarehospice.com), Universal Compression (now Exterran Holdings, www.exterran.com), and Verdugt Holdings.

Jeff received a B.A. in Economics and Mathematics, cum laude, from Clark University and a M.A. in Business Administration from Harvard Business School.