Welcome to today's Defense Business Briefing, your weekly roundup of the latest defense industry news.

Top defense companies decline Sanders' offer to testify on waste, fraud and cost overruns

Executives from Lockheed Martin, Raytheon Technologies and Boeing declined an invitation from Senate Budget Committee Chairman Bernie Sanders (I-VT) and Sen. Chuck Grassley (R-IA) to testify during a hearing about waste, fraud, cost overruns and auditing the Pentagon.

Defense contractors take varied approach to COVID-19 vaccine, but most are encouraging employees

With the COVID-19 vaccine now widely available nationwide, many defense contracting executives say they see the vaccine as a path forward, allowing them to ramp up their work and move past this challenging time.

With Northrop IT and Perspecta acquisitions complete, Peraton looks to full integration

After adding two major acquisitions, Peraton is now looking to early July as a key timeframe in the integration of the three companies.

Leidos seeks 25% reduction in facilities over next three years

Leidos hopes to cut its office space by 25% over the next three years, according to the company's chief financial officer.

Maxar says Raytheon workmanship issue will delay WorldView Legion program

Maxar Technologies said earlier this month a workmanship issue will delay the company's WorldView Legion program.

TransDigm says public report on IG investigation could be released this summer

TransDigm executives said the company is continuing to work through an audit with the Defense Department inspector general and anticipates a public report could be released before the end of September.

After Teledyne-FLIR pairing, executive says new company will offer expanded unmanned products

Teledyne earlier this month completed its acquisition of FLIR Systems, a deal one executive says will result in a broader range of unmanned systems.

Lockheed names new GM for integrated fighter group

Lockheed Martin said it has named OJ Sanchez vice president and general manager for its integrated fighter group, succeeding Bridget Lauderdale.

The week ahead

Senior defense officials are slated to appear on Capitol Hill this week, while Washington-area think tanks host several events on national security.

Pentagon continues to seek billions in pandemic-related costs

Acting Pentagon acquisition chief Stacy Cummings said the Defense Department still needs at least $11 billion in supplemental funding from Congress to support defense contractors with pandemic-related costs and avoid cutting modernization programs and military readiness accounts.

Smith eyeing intellectual property reform in upcoming defense policy bill

House Armed Services Committee Chairman Adam Smith (D-CA) said today he is considering including several reform measures in the upcoming defense authorization bill that would "spur innovation, get more for our money, make the competition work and avoid vendor lock."

Hicks directs reviews, announces 'data decrees' in push for DOD to become 'data-centric organization'

Deputy Defense Secretary Kathleen Hicks is directing a series of reviews starting this summer on the Defense Department's progress toward becoming a "data-centric organization," including an assessment of the DOD chief data officer position.