Willdan Group, Inc. (“Willdan”) (NASDAQ: WLDN), today announced that it expects to release first quarter 2021 financial results after the close of the stock market on Thursday, May 6, 2021. The Company will be hosting an investor conference call and webcast related to this release at 5:30 p.m. ET/2:30 p.m. PT the same day. The details for the investor conference call are as follows:

Date:

Thursday, May 6, 2021

Time:

5:30 p.m. ET/2:30 p.m. PT

Toll-free call-in number:

+1 866-248-8441

Conference Code:

7570216

Webcast:

https://ir.willdangroup.com/events-presentations

For those unable to listen at the designated time, the call will remain available for replay over Willdan Group, Inc. investor relations website for approximately 12 months. The telephonic replay of the conference call will be available through May 20, 2021 and may be accessed by calling 888-203-1112 and entering the passcode 7570216.

About Willdan Group, Inc.

Willdan is a nationwide provider of professional technical and consulting services to utilities, government agencies, and private industry. Willdan’s service offerings span a broad set of complementary disciplines that include electric grid solutions, energy efficiency and sustainability, engineering and planning, and municipal financial consulting. For additional information, visit Willdan's website at www.willdan.com.

Stacy McLaughlin / (714) 940-6300 smclaughlin@willdan.com

Al Kaschalk / (310) 922-5643 akaschalk@willdan.com