Exhibit 99.1 Willdan Group Reports Fourth Quarter/Full Year 2023 Results and Provides 2024 Outlook ANAHEIM, Calif. –March 7, 2024 – Willdan Group, Inc. ("Willdan") (Nasdaq: WLDN) today reported financial results for its fourth quarter and fiscal year ended December 29, 2023 and outlook for 2024. "We had an exceptional fourth quarter," said Mike Bieber, Willdan's President and Chief Executive Officer. "Revenue, profitability and cash flow were above our expectations, aided by end of year program expansions. ...

Willdan Group, Inc. (NASDAQ:WLDN) Q3 2023 Earnings Conference Call November 2, 2023 5:30 PM ET Company Participants Al Kaschalk - VP, Investor Relations Thomas Brisbin - Chief Executive Officer and Chairman Creighton Early - Chief Financial Officer Michael Bieber - President Conference Call Participants Craig Irwin - Roth MKM Operator Good day, ladies and gentlemen, and welcome to the Willdan Group Third Quarter 2023 Financial Results Conference Call. Our host for today's call is Al Kaschalk, Vice Presiden ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 29, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-33076 WILLDAN GROUP, INC. (Exact Name of Registrant as Specified in Its Charter) Delaware 14-1951112 (State or Other ...

Willdan Group, Inc. (NASDAQ:WLDN) Q2 2023 Earnings Conference Call August 3, 2023 5:30 PM ET Company Participants Al Kaschalk - VP of IR Thomas Brisbin - Chairman and CEO Kim Early - Chief Financial Officer Mike Bieber - President Conference Call Participants Craig Irwin - ROTH MKM Moshe Katri - Wedbush Securities Operator Good day, ladies and gentlemen, and welcome to Willdan Group's Second Quarter 2023 Financial Results Conference Call. Our host for today's call is Al Kaschalk. [Operator Instructions] I w ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-33076 WILLDAN GROUP, INC. (Exact Name of Registrant as Specified in Its Charter) (IRS Employer Identification No.) Delawar ...

Willdan Group, Inc. (NASDAQ:WLDN) Q1 2023 Earnings Conference Call May 4, 2023 5:30 PM ET Company Participants Al Kaschalk - VP of IR Thomas Brisbin - Chairman and CEO Creighton Early - CFO and VP Michael Bieber - President Conference Call Participants Chip Moore - EF Hutton Marc Riddick - Sidoti Operator Good day, ladies and gentlemen, and welcome to the Willdan Group First Quarter 2023 Financial Results Conference Call. [Operator Instructions] At this time, it is my pleasure to turn the floor over to your ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-33076 WILLDAN GROUP, INC. (Exact Name of Registrant as Specified in Its Charter) Delaware 14-1951112 (IRS Employer Identi ...

Willdan Group, Inc. (NASDAQ:WLDN) Q4 2022 Earnings Conference Call March 9, 2023 5:30 PM ET Company Participants Al Kaschalk - VP of IR Thomas Brisbin - Chairman & CEO Creighton Early - CFO & VP Michael Bieber - President Conference Call Participants Chip Moore - EF Hutton Marc Riddick - Sidoti & Company Operator Greetings, and welcome to the Willdan Group Fourth Quarter and Full Year 2022 Financial Results Conference Call. [Operator Instructions]. It is now my pleasure to introduce your host, Al Kaschalk o ...

Table of Contents If an emerging growth company, indicate by check mark if the Registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ | "C/l UNITED STATES | | | --- | --- | | SECURITIES AND EXCHANGE COMMISSION | | | Washington, D.C. 20549 | | | FORM | 10-K | | (Mark One) | | | ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES | | | EXCHANGE ACT OF 1934 | | ...

Financial Data and Key Metrics Changes - Gross revenue for Q3 2022 increased by 23.5% year-over-year to $121.4 million, while net revenue rose 8.2% to $58.9 million [23] - EBITDA margin for Q3 2022 was 13.5%, with adjusted EBITDA at $8.0 million compared to $10.1 million in Q3 2021 [10][27] - The net profit for Q3 2022 was $76,000, down from $840,000 in Q3 2021, reflecting a loss before income taxes of $1.5 million [26] Business Line Data and Key Metrics Changes - The Energy segment showed strong performance, with energy consulting and engineering contributing significantly to revenue growth [11] - Construction management revenues increased, but lower software revenues impacted gross profit margins, which fell to 30.9% from 38.8% year-over-year [24] - The Engineering segment continued to grow, with new assignments in Florida and Texas, indicating expansion beyond California [18] Market Data and Key Metrics Changes - The company is actively engaging with California IOUs, with significant contracts in place, including those with Los Angeles Department of Water and Power and Con Edison [13][14] - The Inflation Reduction Act has created opportunities for the company to assist cities with energy and climate tax incentives [19] Company Strategy and Development Direction - The company is focusing on electrification and clean energy transition, leveraging its expertise in performance contracting and municipal engineering [11][40] - Willdan aims to create synergies with cities and engineering practices to support decarbonization efforts [12] Management's Comments on Operating Environment and Future Outlook - Management affirmed guidance for 2022, expecting net revenue growth greater than 10% and an EBITDA margin exceeding 10% [9][33] - The company has resolved major issues with three of the four California IOUs, indicating a positive outlook for future operations [20] Other Important Information - Cash flows from operations improved, with positive cash flow of $8.1 million for Q3 2022, compared to cash used in 2021 [29] - The credit agreement has been amended to adjust the minimum adjusted EBITDA threshold and leverage ratio, extending through March 31, 2023 [31][32] Q&A Session Summary Question: Electrification opportunity and IRA drivers - Management discussed the importance of electrification for IOUs and how Willdan is positioned to capitalize on this trend, particularly in California and New York [37][40] Question: General outlook on the company's position - Management expressed optimism about the company's ability to pivot towards electrification and energy savings, highlighting ongoing projects and contracts [41][44]