The agreements bring company closer to target to locally manufacture Dh70 billion worth of products in its procurement pipeline
"After two years in the Pentagon, I've decided the time is right to return to the private sector," Sweeney said in a statement on Saturday, Xinhua news agency reported.
His departure comes after former Secretary of Defence Jim Mattis stepped down in December.
Mattis, who worked with Sweeney when he led the US Central Command, picked Sweeney to be his chief of staff in early 2017. Sweeney retired as a Rear Admiral from the US Navy in 2014.
Sweeney's decision is the latest by a senior official to leave the Pentagon. Earlier this week, Pentagon spokeswoman Dana White announced her departure.
Deputy Defence Secretary Patrick Shanahan is now Acting US Secretary of Defence.
The agreements bring company closer to target to locally manufacture Dh70 billion worth of products in its procurement pipeline
The two agreements follow the partnership between Q Holding and Abu Dhabi Housing Authority to develop the two regions in line with Abu Dhabi's Vision 2030 to build sustainable cities and provide an advanced housing environment for citizens of the country
Abu Dhabi is investing Dh10 billion across these programmes to more than double the size of its manufacturing sector to Dh172 billion
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