The deal provides certainty and predictability to its 500 members who are among the Commonwealth’s leading nonprofits and government institutions.

The supply deal set to commence in May 2015 and extends to November 2019.

PowerOptions president and CEO Cynthia Arcate said, "This contract is a great opportunity for our customers, with several pricing options. Members can lock in their price for the full term of the contract, creating an ability to better predict their natural gas bills."

PowerOptions has been providing affordable energy solutions to nonprofits, state entities, cities and towns throughout the Commonwealth area for more than 15 years.

The two firms signed a similar electric contract agreement worth $175m in October 2013.

Hess Energy Marketing manager, New England direct sales, David Gilbert said we are pleased that PowerOptions has again selected us from a strong pool of candidates to continue serving their members for the next several years.

"This unique offering to the PowerOptions members is another example of Hess Energy Marketing as a total energy management provider," Gilbert added.

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