![William Jefferson](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
William Jefferson
Chief Operating Officer at
NISOURCE, INC.
Net worth: 4 M $ as of 2026-08-30
Profile
William Jefferson is currently Executive VP, Chief Operating & Safety Officer at NiSource, Inc. since 2024.
Former positions include Operations Director & General Manager-Plant at STP Nuclear Operating Co., VP-Transmission Maintenance & Construction at Duke Energy Corp.
from 2010 to 2014, Plant Manager at Susquehanna Electric Co., and Senior Manager-Plant Engineering at Peach Bottom Atomic Power Station from 1998 to 1999.
Education includes undergraduate studies at Purdue University.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
NISOURCE INC 0.02% | 2026-03-15 | 99,501 ( 0.02% ) | 4 M $ | 2026-08-30 |
William Jefferson active positions
| Companies | Position | Start |
|---|---|---|
| NISOURCE, INC. | Chief Operating Officer | 2022-06-30 |
Former positions of William Jefferson
| Companies | Position | End |
|---|---|---|
| DUKE ENERGY CORPORATION | Corporate Officer/Principal | 2013-12-31 |
Peach Bottom Atomic Power Station | Corporate Officer/Principal | 1998-12-31 |
Susquehanna Electric Co.
 Susquehanna Electric Co. Alternative Power GenerationUtilities Produces hydro electric power | Corporate Officer/Principal | - |
STP Nuclear Operating Co.
 STP Nuclear Operating Co. Electric UtilitiesUtilities Operates nuclear plants | Chief Operating Officer | - |
Training of William Jefferson
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
64
1st degree connections
6
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 6 |
|---|---|
STP Nuclear Operating Co.
STP Nuclear Operating Co. Electric UtilitiesUtilities Operates nuclear plants | Utilities |
NiSource, Inc.
 NiSource, Inc. Gas DistributorsUtilities Operates as an energy holding company whose subsidiaries engages in natural gas distribution, generates and distributes coal-fired electric & hydroelectric energy | Utilities |
Purdue University
 Purdue University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Duke Energy Corp.
 Duke Energy Corp. Electric UtilitiesUtilities Generates, transmits and distributes electricity & natural gas | Utilities |
Susquehanna Electric Co.
Susquehanna Electric Co. Alternative Power GenerationUtilities Produces hydro electric power | Utilities |
Peach Bottom Atomic Power Station |
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