PetroSun Appoints Mark R. Edwards, Ph.D. as Chief of Technology and Sustainability

SCOTTSDALE, AZ, Jun 16 (MARKET WIRE) --
PetroSun, Inc. (PINKSHEETS: PSUD) announced today that it has appointed
Mark R. Edwards, Ph.D. as Chief of Technology and Sustainability.

Dr. Edwards has studied algae for over 40 years and is an internationally
recognized expert on algae and its co-products. His book "Green Algae
Strategy" is the best-selling book on algae and won the 2009 Independent
Publishers Gold Medal for the "Best Science Book of 2008."

Mark graduated from the U.S. Naval Academy with degrees in engineering,
oceanography and meteorology. He earned an MBA and PhD in marketing and
consumer psychology at Arizona State University where he has taught
marketing, entrepreneurship and sustainability for over 30 years. Mark
served as a director for a Fortune 50 international foods and
transportation company where he began his quest to find and develop new
food sources.

He served as CEO of the advanced technology and software firm he founded,
TEAMS International, for twenty-four years. TEAMS sold to an international
consultancy after it won the Inc. 500 award for profitability and growth
in 1998. Mark served as lead consultant to over 400 firms and governments
including Disney, GE, Intel, J&J, HP, British Petroleum, Saudi Aramco,
General Mills, Nabisco, Mayo Clinic, Coca Cola, Motorola, Bank of America
and several U.S. agencies including DOD, Special Forces, DOE, FAA and the
National Laboratories.

About PetroSun

PetroSun, Inc. is a diversified energy company with technology and
operations in oil, natural gas and helium exploration, development and
production, commercialization of algae-to-biofuels, microbial enhanced
oil recovery and oilfield pipe and supply.

For more information about PetroSun visit the company's website at
www.petrosuninc.com.

Except historical matters contained herein, matters discussed in this news
release are forward-looking statements and are made pursuant to the safe
harbor provision of the Private Securities Litigation Reform Act of 1995.
These forward-looking statements reflect assumptions and involve risks and
uncertainties, which may affect the Company's business and prospects and
cause actual results to differ materially from these forward-looking
statements.

Contact:
Investor Relations
PetroSun, Inc.
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