Jeff Greason

Greason has been active in the development of the regulatory environment for the commercial space flight industry. He has worked with the FAA's Office of Commercial Space Transportation (AST) since 1998, has served on the advisory group to AST, COMSTAC as a member of the working group on reusable launch vehicles (RLV) since 2000, and as an invited full member of COMSTAC since 2005. He was one of the leaders of the development of the Commercial Space Launch Amendment Act of 2004. He co-founded the Commercial Spaceflight Federation (formerly Personal Spaceflight Federation).

Previously, he was the team lead at Rotary Rocket for engine development, and earlier worked at Intel.

Greason was named a member of the Review of United States Human Space Flight Plans Committee on May 7, 2009. Since then he has given a number of speeches on space policy and space settlement.{{cite AV media

| url = https://www.youtube.com/watch?v=crx8UBdWL2M

| people = Jeff Greason

| title = Captains of Our Fate

| medium = speech

| publisher = International Symposium for Personal and Commercial Spaceflight (ISPCS)

| date = 2014 }}{{cite AV media

| url = https://www.youtube.com/watch?v=sHuiNeoA1RQ

| people = Jeff Greason

| title = Private Industry and Economic Use of Space

| medium = speech

| publisher = Ideacity

| date = 2014 }}{{cite AV media

| url = https://www.youtube.com/watch?v=cqi5OT-Wqmg

| people = Jeff Greason

| title = Space Policy: The 20 Year Plan

| medium = speech

| publisher = International Space Development Conference

| date = 2012 }}{{cite AV media

| url = https://www.youtube.com/watch?v=Wy2kIPLsUn0

| people = Jeff Greason

| title = A Settlement Strategy for NASA

| medium = speech

| publisher = International Space Development Conference

| date = 2011 }}{{cite AV media

| url = https://www.youtube.com/watch?v=m8PlzDgFQMM

| people = Jeff Greason

| title = Making Space Pay and Having Fun Doing It

| medium = speech

| publisher = TEDx

| date = 2011 }}

In July 2003, Greason testified before the joint House/Senate subcommittee hearings on Commercial Human Spaceflight that addressed the transition from aircraft regulation to launch vehicle regulation for suborbital vehicles.{{cite news|title=Ensuring the Safety of Human Spaceflight|url=http://www.gpo.gov/fdsys/pkg/CHRG-111hhrg53689/html/CHRG-111hhrg53689.htm|accessdate=6 October 2015|agency=US Government Printing Office|publisher=One Hundred Eleventh Congress|date=2 December 2009}}

He is one of the founders of XCOR Aerospace and was its CEO from 1999 through February 2015,{{cite press release|title=XCOR Aerospace Announces Jay Gibson as new Chief Executive Officer|date=March 16, 2015|publisher=XCOR Aerospace|url=http://www.xcor.com/news/xcor-aerospace-announces-jay-gibson-as-new-chief-executive-officer|accessdate=November 25, 2015}} after which he served as chief technologist. In November 2015 Greason left XCOR with two other founders to form Agile Aero.{{cite press release|title=Founders Stepping Back Marks New Phase in XCOR Lynx Development|date=November 23, 2015|publisher=XCOR Aerospace|url=http://www.xcor.com/news/founders-stepping-back-marks-new-phase-in-xcor-lynx-development/|accessdate=November 25, 2015|archive-date=November 24, 2015|archive-url=https://web.archive.org/web/20151124130902/http://www.xcor.com/news/founders-stepping-back-marks-new-phase-in-xcor-lynx-development/|url-status=dead}}{{cite web|title=XCOR founders to stay in Midland with latest project|date=December 5, 2015|publisher=Midland Reporter-Telegram|url=https://www.mrt.com/news/article/XCOR-founders-to-stay-in-Midland-with-latest-7417189.php|accessdate=July 24, 2019}} He was a member of the XCOR board of directors until he resigned in March 2016 and no longer has any connection with XCOR Aerospace.{{cite press release|title=XCOR Announces New Board of Directors|date=March 30, 2016|publisher=XCOR Aerospace|url=http://www.xcor.com/news/new-board-of-directors-and-advisory-board-members/|accessdate=March 30, 2016|url-status=dead|archiveurl=https://web.archive.org/web/20160405003107/http://www.xcor.com/news/new-board-of-directors-and-advisory-board-members/|archivedate=April 5, 2016}} In 2017, XCOR Aerospace went out of business after bankruptcy.

From November 2015 through July 2019{{cite press release|title=Electric Sky Acquires Agile Aero|date=July 24, 2019|publisher=Electric Sky|url=http://el-sky.com/doc/2019-07-23%20El-Sky%20Press%20Release.pdf|accessdate=July 24, 2019}} he served as CEO of Agile Aero, a company developing rapid prototyping capabilities for aerospace vehicles, which has since been acquired by Electric Sky.

He publishes occasional articles explaining space issues at the Tau Zero Foundation blog.{{cite web|title=Gravity and Health|date=May 9, 2019|publisher=Tau Zero Foundation|url=https://tauzerostore.org/blogs/news/gravity-and-health|accessdate=August 5, 2019|archive-date=August 6, 2019|archive-url=https://web.archive.org/web/20190806014438/https://tauzerostore.org/blogs/news/gravity-and-health|url-status=dead}} An article summarizing the field of interstellar propulsion and the work of the Tau Zero Foundation cites him.{{cite web|title=The Stars Are Far: Getting There Requires Time, Tech And Public Advocacy|date=August 5, 2019|work=Forbes|url=https://www.forbes.com/sites/gregautry/2019/08/05/the-stars-are-far-getting-there-requires-time-tech-and-public-advocacy/#6d63fe166a8e|accessdate=August 5, 2019}}

In May 2019 he authored an article on a new approach to space propulsion, exchanging momentum with surrounding space plasma such as the solar wind or interstellar medium to expel reaction mass while retaining the kinetic energy, to accelerate a vehicle.{{cite journal |last=Greason|first=Jeffrey|date=May 2019|title= A Reaction Drive Powered by External Dynamic Pressure|url=https://www.jbis.org.uk/paper/2019.72.146|journal=Journal of the British Interplanetary Society|volume=72|issue=5|pages=146–152|archive-date=October 23, 2019|archive-url=https://web.archive.org/web/20191023060950/http://jbis.org.uk/paper/2019.72.146|access-date=April 20, 2020}} [https://tauzero.aero/wp-content/uploads/JBIS-May-2019-Greason.pdf Alt URL]

Starting in the summer of 2020, Greason teaches an online course through the Kepler Space Institute on advanced space propulsion.{{cite press release|title=Jeff Greason Joins the Kepler Space Institute Faculty|date=April 19, 2020|publisher=Kepler Space Institute|url=http://www.spaceref.com/news/viewpr.html?pid=55585|accessdate=April 20, 2020}}

Time magazine named Greason an Inventor of the Year in 2002 for his team's work on the EZ-Rocket rocketplane.{{cite news|last1=Hamilton|first1=Anita|title=Best of the Rest|url=http://content.time.com/time/magazine/article/0,9171,183961,00.html|accessdate=6 October 2015|publisher=Time|date=Aug 9, 2002}} Greason holds 28 U.S. patents.{{cite web|title=US Patent Collection|url=https://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=0&f=S&l=50&TERM1=greason&FIELD1=INNM&co1=AND&TERM2=jeffrey&FIELD2=INNM&d=PTXT|website=Patent Database Search|publisher=United States Patent and Trademark Office|accessdate=29 November 2021}}

{{Reflist|30em}}

• [http://www.nasa.gov/offices/hsf/home/index.html Review of U.S. Human Space Flight Plans Committee website] {{Webarchive|url=https://web.archive.org/web/20100206053825/http://www.nasa.gov/offices/hsf/home/index.html |date=2010-02-06 }}
• [http://el-sky.com/#who-we-are Electric Sky official bio]
• [https://www.youtube.com/watch?v=crx8UBdWL2M 2014 Address to INTERNATIONAL SYMPOSIUM FOR PERSONAL AND COMMERCIAL SPACEFLIGHT]

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Category:Living people

Category:American aerospace businesspeople

Category:People in the space industry

Category:XCOR Aerospace

Category:Year of birth missing (living people)