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“Mark Sirangelo”
Mark Sirangelo’s Resignation Letter to Jim Bridenstine

Mark Sirangelo (Credit: SNC)

May 20, 2019


Over the last couple of months we have accomplished much together and it has been truly exciting. After having gone through an evaluation of our conversations and the future path you have outlined for NASA it is with regret that I believe that it is time for me to end my role as the Special Assistant to the Administrator.

I truly appreciate that you reached out to me earlier this year to join NASA in support of the developmental to return the U.S. to the Moon. It was such a challenging and amazing opportunity that it led me to halt all the other aspects of my life to join you and NASA. As NASA wished to expedite my entry, NASA offered, and I agreed upon the position of Special Assistant as an interim role. This role was to help develop the top-level technical path, budget and potential future management structures for the America’s Lunar 2024 challenge with the understanding that a further Agency level role might develop for me from this.


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  • May 25, 2019
Tactical Mistakes Led to Mark Sirangelo’s Departure from NASA

Lesson: Congress isn’t a speed bump. It’s more like a spike strip. When it forces you to back up, you end up with shredded tires. They launched an accelerated moon plan w/o getting a buy-in from Congress. It’s a co-equal not a subordinate branch of government. — (@spacecom) May 24, 2019 via GIFER

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  • May 24, 2019
Mark Sirangelo Departs NASA After 44 Days

Well, that was fast. On April 9, NASA announced the appointment of Mark Sirangelo as a special assistant to Administrator Jim Bridenstine for the purpose of overseeing the space agency’s plan to land astronauts on the moon by 2024. On Thursday, Bridenstine announced that his new assistant is departing the agency. Sirangelo’s tenure lasted 44 days. In announcing the appointment last month, Bridenstine said Sirangelo would lead the planning for […]

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  • May 23, 2019
Bridenstine Appoints Sirangelo as Special Assistant to Oversee Lunar Plans

Appointment of Mark Sirangelo Message from NASA Administrator Jim Bridenstine I am pleased to announce the appointment of Mr. Mark Sirangelo as Special Assistant to the Administrator. In this role, Mark will have broad responsibility to work across the Mission Directorates to further develop the Exploration Campaign. This includes a strategy to meet the Administration’s policy to return astronauts to the lunar surface by 2024. he will also lead the […]

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  • April 8, 2019
Sirangelo Joins CU Boulder Engineering as Entrepreneur-in-Residence

Mark Sirangelo (Credit: Alyson McClaran)

BOULDER, Colo. (CU Boulder PR) — Mark Sirangelo, who just concluded his career as the head of aerospace giant Sierra Nevada Corporation’s Space Systems, is joining the University of Colorado Boulder as an entrepreneur-in-residence beginning this month. Bobby Braun, dean of the College of Engineering and Applied Science, announced today that Sirangelo will join CU Boulder after nearly 10 years at SNC.

“Mark is an aerospace visionary who recognizes that CU Boulder is a premier research and innovation engine for the United States and the hub of Colorado’s aerospace ecosystem,” Braun said. “A leader in entrepreneurial space, a contributor to national security, a pilot and veteran, Mark’s expertise and creativity are a perfect mix for this groundbreaking institution.”


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  • August 10, 2018
Sirangelo Resigns from Sierra Nevada Corporation

Mark Sirangelo has resigned from Sierra Nevada Corporation (SNC) for what CEO Fatih Ozmen, owner says are personal reasons, Space News reports. He had run SNC’s Space Systems Division for nearly a decade after his former company, SpaceDev, was acquired. “We are proud and grateful for all we have achieved in partnership with Mark over the last ten years,” Ozmen said. “Mark has an inspiring enthusiasm for space and a […]

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  • July 5, 2018
Program Updates from ISPCS
The second SpaceShipTwo is carried aloft by WhiteKnightTwo on its first captive carry flight. (Credit: Virgin Galactic)

The second SpaceShipTwo is carried aloft by WhiteKnightTwo on its first captive carry flight. (Credit: Virgin Galactic)

NASA and various commercial companies gave updates on their programs during the International Symposium on Commercial and Personal Spaceflight this week in Las Cruces, NM.

What follows are summaries that include:

  • suborbital programs (Virgin Galactic, Blue Origin)
  • commercial cargo (SpaceX, Sierra Nevada Corporation)
  • commercial crew (NASA, Boeing, ULA).

The summaries are based on Twitter posts from attendees. A big thanks to Thanks to Tanya Harrison (‏@tanyaofmars), Frank Slazer ‏(@FSlazer), Jeff Foust (‏@jeff_foust), Michael Simpson ‏(@SpaceSharer), and Melissa Sampson (‏@DrSampson) for the coverage.


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  • October 14, 2016
SNC Dream Chaser Program Preparing for Second Free-Flight Test and First Orbital Test
SNC technicians inspect the Dream Chaser ETA. (Credit: SNC)

SNC technicians inspect the Dream Chaser ETA. (Credit: SNC)

SPARKS, Nev., October 7, 2015 (SNC PR) – In anticipation of a second phase of flight testing, Sierra Nevada Corporation’s (SNC) Space Systems has announced significant updates to two Dream Chaser®  spacecraft currently in development. The spacecraft are the atmospheric engineering test article (ETA) and the advanced composite orbital vehicle, which when tested will undergo a suborbital and orbital flight regimen, respectively. SNC’s Mark Sirangelo provided a program update at the International Symposium for Commercial and Personal Spaceflight (ISPCS) in New Mexico.


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  • October 7, 2015
CSF Adds New Member Companies

CSF_logo2WASHINGTON, D.C. (CSF PR) — The Commercial Spaceflight Federation welcomed several new member companies at its Executive Board meeting this week, expanding its membership to more than 60 companies.

Spaceport Camden of Camden County, Georgia joined CSF as an Executive Member. Steve Howard, Spaceport Camden project leader, will represent his organization on the CSF Board of Directors. “CSF’s mission strategically aligns with Camden’s goals, and we are pleased to join other industry leaders as part of this organization,” Howard said.


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  • September 23, 2015