Our Team

We are committed to providing creative, practical solutions to create long-term value for our partners.

David Modesett


About David

David has more than 35 years of experience in the energy business. As an entrepreneur, he has built three companies while expanding scope and expertise during seismic changes in world energy markets.

In 2004, David founded Vega Energy Partners. Vega focused on structuring solutions for producers, midstream companies, utilities, LNG exporters, large end-users, and retail aggregators. These solutions included natural gas infrastructure development, asset optimization, and physical commodity management services. Business operations focused on Infrastructure Development and Infrastructure Management.

Vega created and aggregated demand across the eastern United States, leveraging this demand to drive $6.0 Billion of capital projects and over 5.6 Bcf/d of capacity additions including brownfield pipeline expansion projects and three greenfield pipeline projects. Vega’s long-term infrastructure-based solutions helped increase supply liquidity, lower costs to consumers, and reduce carbon emissions in the U.S., Europe, and India.

In 2021, David sold Vega Energy to a global commodity company. After the sale, David, with a core group of former Vega employees, founded Arc57.

Matt Wenaas

Corporate Development

About Matt
Matt joined Arc57 at its founding in April 2021. Prior to working at Arc57, Matt worked for its predecessor company Vega Energy Partners across a variety of roles, most recently as Head of Analytics. His responsibilities included fundamentals analysis and evaluation of all transactions, financial modeling, supporting capital raises, and analyzing market fundamentals.

Matt graduated from the University of Calgary in 2006 with a Bachelor of Commerce degree in Finance.

Kasyn Stevenson


About Kasyn
Kasyn joined Arc57 at its founding in April 2021. Prior to working at Arc57, Kasyn worked for its predecessor company Vega Energy Partners as in house counsel. Prior to Kasyn’s time at Vega and Arc57, she worked for Norton Rose Fulbright and Baker Botts as transactional counsel, focused primarily on energy company mergers and acquisitions and joint ventures.

Kasyn graduated from Pomona College in 2009 as a Bachelor of Arts in Mathematical Economics and Politics double major. Immediately after graduation, Kasyn attended the University of Texas at Austin and obtained her Juris Doctor in 2012.

John Alford

Business Development

About John
John joined Arc57 in 2023. Prior to working at Arc57, John spent two years doing Business Development and Origination at Six One Commodities, assisting the company in building out its Natural Gas Trading portfolio. Before Six One, John was at Vega Energy for 9 years and held several roles within the Business Development and Trading & Scheduling groups. John also worked at Protiviti in Audit and Sarbanes-Oxley compliance groups.

John graduated Texas A&M University in 2010 with a Bachelor of Business Administration degree in Finance.

Chris Beggins

Business Development

About Chris
Chris joined Arc57 at its founding in April 2021. Chris started career his in the energy industry in 1987 developing a marketing trading platform for Tejas Power Corporation. In 1993, Chris formed Inventory Management and Distribution company (IMD) to perform Asset Management Agreements with utilities across the United States. After selling IMD to Koch energy trading in 2000, Chris stayed on and led business development activities until the company was sold to Merrill Lynch Commodities. At Merrill, Chris assumed the role of Managing Director of Business Development for natural gas, power, crude, and coal. In 2008, Merrill, was acquired by Bank of America at which point Chris left to join with Vega Energy to pursue unregulated opportunities in natural gas marketing. At Vega, Chris helped structure a number of pipeline transactions to bring shale gas to the ultimate end user. After the sale of Vega Energy, Chris joined Arc57 in a business development role.

Rebecca Stehle

Business Development

About Rebecca
Rebecca joined Arc57 in 2023. Prior to working at Arc57 she worked for ExxonMobil for 10 years as a reservoir engineer in various leadership positions, most recently focused on Permian development. Prior to that Rebecca was at Dow Chemical for 2 years in their specialty chemicals business in Delaware. She concurrently served in the United States Naval Reserve as an Engineering Duty Officer until 2021.

Rebecca graduated from Northwestern University in 2006 with a Bachelor of Science degree in Chemical Engineering and from Cornell University in 2011 with a Master of Science and PhD in Chemical Engineering.

Ashley Irwin


About Ashley
Ashley joined Arc57 in 2023. Prior to working at Arc57, Ashley spent two years as Treasurer and Head of Credit at Six One Commodities, assisting the company in increasing its borrowing base facility from $125M to $745M in one year. Before Six One, Ashley was at Vega Energy for 15 years and held several roles within the strategy and optimization group, including trading, scheduling, accounting, and risk management. Ashley also worked at KPMG Canada in the US Corporate Tax group and at Duke Energy North America in the Structuring group.

Ashley graduated the University of Texas in 2002 with a Bachelor of Science degree in Accounting and a Master of Science degree in Accounting.

Julie Pincus


About Julie

Julie joined Arc57 at its founding in April 2021. Prior to working at Arc57, Julie worked for Vega Energy Partners, Ltd. (VEP) for 13 years as Controller participating in growth from recently formed company to its ultimate sale. Prior to VEP, Julie’s Audit Manager position at KPMG, led her to the Controller position at BMC Software for nine years.

Julie graduated from Florida State University with a BS in Accounting. She is certified as a public accountant in Texas.


3701 Kirby, Suite 1166
Houston, TX 77098