EnGen Leadership

EnGen Program Advisory Committee 

SarahBartlettSarah Bartlett, PDC Energy

Sarah is the Lead Air Quality EHS Professional at PDC Energy, Inc. She graduated from the Colorado School of Mines with a BS in Chemical Engineering and an MS in Engineering Technology Management in 2007 and 2009, respectively. Sarah has spent her career working in various aspects of air quality and environmental compliance in the oil and gas industry. At PDC, Sarah has been charged with developing and managing air quality permitting and compliance programs. In her spare time, Sarah loves to camp and read, and she always welcomes book recommendations.


anaAna Gutierrez, Hogan Lovells

Ana Gutierrez, Associate, focuses her practice on government regulatory issues. She advises clients on environmental regulatory matters, with a particular concentration on energy and natural resources. Recent and past experiences include advising oil and gas companies on environmental compliance strategies, permitting and enforcement matters, and preparation of comments on federal resource management activities; consulting local jurisdictions on the regulation of oil and gas operations; drafting comments on behalf of energy developers in response to federal rulemaking and decision-making on various environmental and energy-related issues; advising a leading clean energy company on the development of one of the largest wind farms in the United States; assisting with environmental and natural resources litigation related to the National Environmental Policy Act, the Endangered Species Act, as well as various other federal statutes; and assisting clients on numerous land use matters, including a particular focus on obtaining federal and local permitting authority for mining, renewable energy, and other development projects. Ana also advises ski areas and other recreation clients as public lands, land use, environmental, and regulatory counsel.

seanSean Howley, Noble Energy, Inc.

Sean received a B.A. in Politics from Fairfield University in Fairfield, Connecticut and an M.S. in Global Energy Management from the University of Colorado Denver.  After experiences in internet development, hospital administration, and politics he realized that energy was his true calling.  Since then, Sean has worked in the Denver offices of EnCana Oil and Gas (USA) Inc., and Pioneer Natural Resources Company, and in both the Platteville and Denver offices of Noble Energy, Inc. He has worked for Noble as a Field Land Negotiator, Land Negotiator, Lead Land Negotiator and Sr. Business Analyst.



Headshot_Abigail SharpAbigail Mercado, Altira Group LLC

Abigail Sharp Mercado is a Venture Capital Associate with Altira Group, where she is involved in screening and evaluating new investment opportunities in the energy technology space as well as assisting in monitoring and strategic / operational planning for portfolio companies.
Prior to joining Altira, Ms. Mercado was the Senior Business Development Manager at Caliber Midstream, where she led deal sourcing, strategy, economic analysis and contract negotiation. Ms. Mercado was with Caliber since inception in October of 2012, having worked with the founding members on business concept and initial private equity investment by First Reserve.
Prior to Caliber, Ms. Mercado was with Triangle Petroleum (NYSEMKT: TPLM, Natural Gas Partners) as the Financial Analyst, where she supported capital raising, mergers and acquisitions, investor relations and financial analysis. Ms. Mercado finance experience also includes a position with Bank of America Merrill Lynch in New York, where she served in their industrials investment banking group, assisting in the structuring of mergers and acquisitions and the underwriting of debt and equity securities for mid- to large industrials corporations.
A native of Dallas, Texas, Ms. Mercado earned a Bachelor of Arts degree in history and a Bachelor of Science degree in human and organizational development from Vanderbilt University. Ms. Mercado is on the Associate Board of ACE Scholarships and enjoys travel, live music and exploring the Colorado outdoors with her husband Sean.


rachelRachel Peterson, A. G. Wassenaar, Inc.

Ms. Peterson, P.G., Project Manager, has eleven years of experience in the environmental consulting industry, performing and managing diverse soil, ground water, and vapor investigation and remediation projects. Management duties include: the organization of project teams, planning, scheduling and coordination of geologic and hydrogeologic investigations and preparing proposals and technical reports.




Jason Stewart, Baker Hughes

Jason Stewart is a Texas native and graduate of Texas A&M University, class of 2002.   He has resided in the greater Denver area for the past 4 years and has been employed in various roles for Baker Hughes during that time.  Currently he is an Account Manager within their Completions group and is responsible for the sale and management of product and service offerings related to successful and economic well completions.  In addition, Jason recently completed his Master of Science degree in Global Energy Management through the University of Colorado – Denver. During his free time, Jason enjoys relaxing with his family and competing in athletic endeavors such as softball, golf, running and Crossfit. He has also been known to coach a youth soccer team when feeling extremely fearless.


tealeTeale Stone, Bill Barrett Corporation

Teale was born and raised in Tulsa, Oklahoma prior to moving to Denver in 2007 where he accepted a soccer scholarship to the University of Denver.  He graduated in 2011 with a degree in Management from the Daniels College of Business.  Teale began working for Bill Barrett Corporation shortly thereafter.  In his three years at Bill Barrett Corporation, Teale serves as a Landman responsible for BBC’s assets in the Uinta Basin.  In his free time Teale enjoys skiing, playing soccer, basketball, and golf.  While he isn’t working at BBC he is still highly involved in a non-profit organization he helped start called the “You Can Play Project”.


nickNick Sutton III, Resolute Energy Corporation

For the past three and a half years, Nick has worked as a Business Analyst for Resolute Energy Corporation in Denver after receiving my B.A. in Earth and Ocean Sciences from Duke University.  While an undergraduate, I did several internships with oil and natural gas companies so landing in the “oil patch” was a natural fit.  Outside of work, my primary interests are sports and music.  At Duke I walked on to the basketball team and played for the legendary “Coach K.”  I also was a soloist for the men’s acapella group “Speak of the Devil” during my junior and senior years.  I love playing basketball, tennis, softball and golf, and I also enjoy skiing.  Being born and raised in the San Francisco Bay Area, I am very passionate about the San Francisco 49ers and the Golden State Warriors and also, of course, Duke Basketball. But, my passion for those teams is all dwarfed by my love for the San Francisco Giants.  Go Giants!