- Employees
- 1001-5000
- Founded
- 1923
- Listing
- For Profit · NYSE:NWE
- Headquarters
- Sioux Falls, SD
Company data last updated Jul 31, 2025.
About NorthWestern Energy
For more than 100 years, NorthWestern Energy continues to deliver the energy and exceptional service that their customers and communities
Who to contact at NorthWestern Energy
Email Format
Leadership & Decision Makers
Contact details of 5 NorthWestern Energy decision makers
Heather Burns
Brian B. Bird
Rick Edwards
Albert Emanuel
Robert C. Rowe
Team & Specialists
Contact details of 1 NorthWestern Energy team members
Tina Castro
General Emails
General company emails, e.g. customer support lines
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Records are compiled from publicly available sources and checked as described in our methodology. Company data last updated Jul 31, 2025.
Frequently Asked Questions about NorthWestern Energy
What does NorthWestern Energy do?
For more than 100 years, NorthWestern Energy continues to deliver the energy and exceptional service that their customers and communities
Where is NorthWestern Energy headquartered?
NorthWestern Energy is headquartered in Sioux Falls, SD.
When was NorthWestern Energy founded?
NorthWestern Energy was founded in 1923.
How many employees does NorthWestern Energy have?
NorthWestern Energy has approximately 1001-5000 employees.
What industry is NorthWestern Energy in?
NorthWestern Energy operates in the Energy & Utilities industry.
What is the email format for NorthWestern Energy?
The most common email format at NorthWestern Energy is {first_name}.{last_name}@northwesternenergy.com. For example: firstname.lastname@northwesternenergy.com.
How do I contact NorthWestern Energy?
You can contact NorthWestern Energy via email at custserv@northwestern.com or info@northwesternenergy.com, headquartered in Sioux Falls, SD.