Cara Semperger

Cara Semperger served as West Power Scheduling Supervisor for Enron North America, managing the Portland-based scheduling team that coordinated physical power deliveries for Tim Belden’s West Power Trading desk. Beyond her supervisory responsibilities, Semperger emerged as the lead user and subject matter expert for EnPower, Enron’s scheduling application suite, conducting extensive user acceptance testing that shaped the system’s development. She also represented Enron on Western Systems Coordinating Council (WSCC) electronic scheduling committees, contributing to industry standards for power scheduling protocols.

Semperger’s email archive in the Enron corpus contains 1,264 messages spanning April 2001 through November 2002, documenting her work across scheduling operations, system implementation, and the company’s post-bankruptcy transition to UBS.

Career at Enron

West Power Scheduling Operations

Semperger supervised a team of four to six schedulers at Enron’s Portland office in the World Trade Center building. Her team members included Corry Bentley (Senior Scheduler), Diana Scholtes, and Donald Robinson, among others. The scheduling team was responsible for coordinating the physical delivery of power positions traded by the West Power desk, managing path confirmations, transmission routing, and coordination with counterparties across the western interconnection.

The work required constant communication with external parties. Semperger’s correspondence shows regular interaction with the WSCC electronic tagging system, OASIS (Open Access Same-Time Information System) services, and various western utilities and control areas. Her team managed scheduling for multiple delivery points, handling the complex logistics of moving electricity across the western grid to fulfill trading commitments.

Reporting Structure

Semperger reported directly to Tim Belden, Vice President of West Power Trading. Email records show her inclusion in Belden’s strategic communications about desk operations, and she regularly reported scheduling volumes and operational issues to his attention. On December 19, 2001, following the bankruptcy filing, Belden included Semperger in his “New West Power Deal Info” email, indicating her role in the desk’s inner circle during the crisis period.

EnPower Implementation

System Development Role

Semperger’s most technically intensive work involved serving as lead user and subject matter expert for Enron’s EnPower scheduling applications. This role is reflected in her signature terms from corpus analysis, where “enpower” (score 10.11, rank #1), “functionality” (11.94, rank #1), “testing” (4.91, rank #1), and “errors” (12.92, rank #1) all appear as high-ownership terms, indicating work that distinguished her from other Enron employees.

The EnPower suite was replacing Enron’s previous Excel and Lotus Notes-based scheduling workflows with an integrated database application. Semperger tested and provided detailed feedback on multiple modules including the Pre-Schedule Workspace (PSW), which replaced Excel-based scheduling sheets, the Path Confirmation module, which replaced a Lotus Notes database, Build Route functionality for automated transmission path creation, and the Deal Entry interface.

Testing Methodology

Semperger’s approach to testing was systematic and thorough. In a July 9, 2001 email describing her testing of the Pre-Schedule Workspace, she wrote: “My target testing date today is June 18th, I am running in Test P in Local Enpower using actual data from our scheduling sheets re-arranged to meet the new guidelines… The daily deals I coded X in columns J and N, the Month long bookouts and BOM bookouts I coded R.” She then documented what worked, what did not work, and specific bug reports.

Her primary IT contacts included Will Smith (49 emails), the main EnPower developer and her most frequent external correspondent, along with Asem Atta for IT support, Duong Luu as IT manager, and Craig Vinson, an external contractor from cmicro.com (23 emails).

Technical Challenges

Beyond application testing, Semperger addressed broader infrastructure issues. The Portland office accessed EnPower servers located in Houston, initially via Terminal Server and later through an attempted DS3 high-bandwidth connection that failed, eventually moving to a thin-client architecture. A September 2001 “Portland Doorstep” audit identified the Houston-Portland connectivity as a business continuity risk. The audit noted an “Observation #5 concerning the I/T system build for a scheduling system and the fact that the server would reside in Houston (and thus, potential exposure if link between Houston and Portland fails).” Semperger was tasked with addressing this connectivity risk as owner of the issue.

Industry Standards Work

WSCC Electronic Scheduling Committee

Semperger participated in Western Systems Coordinating Council industry standards work, engaging with the Electronic Scheduling Collaborative (ESC) on OASIS business practices and electronic scheduling protocols. When the WSCC Electronic Scheduling Committee sought volunteers on December 11, 2001, Semperger responded: “I am interested in being part of this effort if there is still room.” This email, with her signature block identifying her as “West Power Scheduling Supervisor, Enron North America,” provides definitive confirmation of her title.

Her industry work focused on several standards areas including BP #4 (transmission capacity verification), BP #9 (energy scheduling flexibility), BP #24 (curtailments and reloads), OASIS Phase 2 business practices, and Order 638 compliance. She participated in conference calls with peers from Montana Power, SMUD, Puget Sound Energy, Tri-State G&T, and XCel Energy, representing Enron’s perspective on scheduling technology and standards.

Western Interconnection Expertise

The work required deep knowledge of the WSCC electronic tagging (e-tag) system, western transmission path routing, control area coordination, and border point scheduling. Semperger’s signature term analysis shows “wscc” appearing as a high-ownership term (score 8.64, rank #3).

Key Correspondents

Semperger’s email patterns reveal a network spanning IT development, trading operations, and industry contacts.

The concentration of IT-related correspondents reflects Semperger’s significant role in system implementation, while industry contacts demonstrate her external-facing standards work.

Email Activity

Semperger’s email volume shows distinct patterns aligned with her major work initiatives.

The May 2001 spike to 382 emails corresponds with intensive EnPower Pre-Schedule Workspace testing, the highest-volume period in her archive.

Bankruptcy Period

Operational Continuity

Semperger continued her scheduling operations throughout the bankruptcy filing and its aftermath. Her email volume remained elevated through December 2001 and January 2002 as the team maintained power delivery operations during organizational uncertainty.

UBS Transition

On February 1, 2002, Semperger coordinated the transition of West Power scheduling activities to UBS Warburg, which had acquired Enron’s trading operations. In an email about the transition meeting, she noted: “please call 503/464-2099 for the conference phone, I have a dr. appt and cannot attend. All the schedulers will be there, David Steiner and Diana Scholtes and Sean Crandall will also attend.” The email demonstrates her leadership role in ensuring operational continuity during the handoff while delegating appropriately when needed.

Her final emails in the corpus date to November 2002. She remained involved with operations through at least a year of post-bankruptcy restructuring.

Legal Status

Cara Semperger does not appear in Department of Justice or SEC proceedings related to Enron. Her work focused on scheduling operations and system implementation rather than the trading strategies that led to criminal charges against other West Power desk personnel including Tim Belden.

See Also

• Tim Belden — VP West Power Trading, Semperger’s direct supervisor
• Trading Operations — The Portland-based trading desk where Semperger worked

References

This article is based on 1,264 emails from Cara Semperger’s archive in the Enron corpus, spanning April 2001 through November 2002, with correspondence involving 136 unique correspondents. Secondary source searches found references to Semperger in archived Enron emails but no public biographical information, professional profiles, or post-Enron career details.