NiSource
Natural gas and electric utility serving six states
- Energy & Utilities
- Business categories with Pro
- Headquarters
- Merrillville, Indiana
- Industry
- Energy & Utilities
- Website
- nisource.com
- Energy & Utilities
- nisource.com
About NiSource
NiSource describes itself as a natural gas and electric utility company whose Columbia Gas and NIPSCO businesses serve customers across six states. It says nearly all of its revenue comes from regulated utility operations and investments. The company is headquartered in Merrillville, Indiana, and also has a significant corporate presence in Columbus, Ohio. Its history page traces predecessor companies back to 1847 and notes that NiSource became a stand-alone utility company after separating from Columbia Pipeline Group in 2015.
Business categories
Written from NiSource’s own website (www.nisource.com/company, www.nisource.com/company/history, www.nisource.com/company/leadership, www.nisource.com/), checked 17 October 2026.
NiSource email format
NiSource email addresses most often follow flast@nisource.com (first initial and last name), for example jsmith@nisource.com. 99% of the 103 nisource.com addresses we hold that match a known pattern use it.
Most common pattern
flast@nisource.comFirst initial and last name
Example: jsmith@nisource.com
99%
of matched addresses
Based on 103 matched addresses
Read from 188 nisource.com addresses on file. The pattern is inferred from those addresses, and the example uses a placeholder name; real addresses are never shown here.
Similar companies
View allNiSource contacts
Contacts on file by seniority
- C-suite & founders12
- Vice presidents18
- Directors & heads33
- Managers55
- Staff & specialists70
Contacts by department
- Engineering65
- Operations35
- IT & data15
- Leadership10
- Finance9
- Human resources6
- Marketing5
- Sales4
Grouped from job titles.
People at NiSource
The role most often held at each level, from 188 records. Names, locations, emails, phone numbers and LinkedIn profiles unlock with Pro.
| Name | Job title | Location | Contact details |
|---|---|---|---|
| Name locked | Chief Financial OfficerFinance | Locked | |
| Name locked | Vice PresidentLeadership | Locked | |
| Name locked | DirectorOther | Locked | |
| Name locked | ManagerOther | Locked | |
| Name locked | EngineerEngineering | Locked |
+183 more people at NiSource, including 12 in the C-suite, 18 vice presidents and 33 directors.
Unlock with ProMost common job titles
- Manager 15
- Director 7
- Operations Manager 5
- Chief Operating Officer 4
- Chief Financial Officer 4
Where the contacts are based
States
Cities
- Merrillville, IN185
- Warren, PA3
Linked states open the Energy & Utilities leads page for that state.
NiSource in full, on Pro
- Stock listing and ownership
- Products and services, and the official LinkedIn page
- Every email format the company uses
- All job titles and every city on file
- Names, emails and phone numbers of the people
Research NiSource
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NiSource: questions answered
What is NiSource's email format?
NiSource email addresses most often follow flast@nisource.com (first initial and last name), for example jsmith@nisource.com. 99% of the 103 nisource.com addresses we hold that match a known pattern use it.
How many employees does NiSource have?
We do not hold a reliable employee range for NiSource.
How many NiSource contacts does LeadQuasar have?
188 contacts across 143 different job titles, 12 of them at C-suite or founder level, 18 vice presidents and 33 directors. 188 carry an email address and 188 a phone number. Names and contact details unlock with Pro, free for the first 7 days.
Where are NiSource's contacts based?
Most of the NiSource contacts on file are in Indiana (185), Pennsylvania (3), across 2 cities in all. The busiest city on file is Merrillville.