A group of pension and trust funds for local electrical workers has filed petitions to force companies affiliated with Truland Group into bankruptcy amid reports that the Reston-based electrical contractor is winding down operations.

The petitions were filed in a federal courthouse in Baltimore on Tuesday asking a judge to begin Chapter 7 (liquidation) proceedings against various Truland affiliates.

Truland spokeswoman Nancy Gordon-Brooks said Tuesday that she had no comment on the matter.

A former Truland manager said he was notified by phone on Sunday night that he and many other employees, both administrative and union electrical workers, were being laid off immediately. The worker spoke on the condition of anonymity because the company so far has not commented publicly on the matter.

A spokeswoman for Clark Construction, which subcontracts with Truland, said that Truland Electric employees have not reported for work on Clark Construction job sites this week.

“At this time, however, Clark Construction has not received official confirmation from Truland that the company is no longer doing business,” Brian A. Abt, Clark’s president and chief executive, said in a statement. “Currently, Truland has contractual relationships on a number of Clark projects in the region. We will be working with the appropriate sureties as necessary to ensure that all contractual obligations are met and projects continue on schedule.”

Truland and Clark were working on at least one project for Inova Health System, a new 12-story tower for the women’s and children’s hospitals in Fairfax County.

“All I know is that Clark Construction did inform us that Truland has closed,” said Tracy Connell, media relations manager at Inova. She added that Inova’s contract is with Clark, so the hospital system has no direct dealings with Truland.

Truland Group has been run by the Truland family since its founding in 1909. It has provided electrical construction services on major projects such as national parks, Arena Stage, and the Gaylord National Resort and Convention Center. It has also worked on projects in the government sector, including for the Department of Homeland Security and the FBI. The company’s Web site says it is the 10th-largest electrical contractor in the United States.

Alice Crites contributed to this report.