What's Happening at ACES

ACES Members Successfully Integrate Into The SPP Integrated Marketplace

On March 1, 2014, the Southwest Power Pool’s (SPP) Integrated Marketplace (a two-settlement energy and ancillary market) went live. SPP also combined the Balancing Authorities (BA) within its footprint to form a Consolidated Balancing Authority. SPP’s Integrated Marketplace is expected to have combined benefits to SPP’s Members of up … Read More »

ACES Members Successfully Implemented Into MISO South

On December 19, 2013, the Midcontinent Independent System Operator (MISO) successfully integrated a four state region, referred to as MISO South, into MISO’s existing footprint. ACES assisted with the successful implementation of two of its Members, South Mississippi Electric Power Association (SME) and Arkansas Electric Cooperative Corporation (AECC), into MISO South. … Read More »

ACES Names Michael T. Steffes Its President and CEO

September 13, 2013 – Carmel, Indiana ACES Board Chairman, Clifton Karnei, announced today that Michael T. Steffes has been appointed President and CEO of ACES, effective immediately. Steffes joined ACES in 1999 as Vice President of Marketing and Trading, and was promoted to Senior Vice President and Chief Operating Officer in 2002. Since the departure … Read More »

Rayburn Country Electric Cooperative, Inc. Becomes 21st ACES Member

Rayburn Country Electric Cooperative, Inc. (Rayburn) will become the 21st Member (Owner) of ACES, effective August 1, 2013. Rayburn will begin receiving a variety of services from ACES including portfolio modeling and analysis, as well as strategic development and other energy risk management services. “Rayburn currently has full requirements power supply contracts, … Read More »

ACES President & CEO David J. Tudor Submits Resignation; ACES Senior Vice President & COO Michael T. Steffes to Serve as Acting President & CEO

David J. Tudor, President and CEO of ACES, notified the Board of Managers in a letter on May 10 that he is resigning his position to pursue another job opportunity that will allow him to relocate back to his home state of Texas. ACES Board Chairman, Clifton Karnei announced today that … Read More »