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

Navistar takes Army to federal court over ongoing FMTV dispute

Navistar Defense is taking the Army to court for violating the "automatic stay" requirements of the Competition in Contracting Act in procuring vehicles as part of the Family of Medium Tactical Vehicles program.

Elbit retains head of Harris' night vision business after acquisition

Elbit Systems of America, which closed on its purchase of Harris' night vision business over the weekend, said Erik Fox, who has led the business for five years, will remain its chief.

Hayes: Raytheon Technologies has filled three-quarters of top leadership positions

About 75% of the 12 senior executive positions at the planned Raytheon Technologies have executives in place, the United Technologies chief executive said.

U.S. government defends constitutionality of banning Huawei products

The Justice Department is defending the authority of Congress to ban the government and its contractors from purchasing tech products by China-based companies including Huawei, in urging a federal court to dismiss the company's lawsuit claiming the prohibition to be unconstitutional.

GAO opinion in LOGCAP case now due Sept. 18

The Government Accountability Office will now have until Sept. 18 to submit its "advisory opinion" on the LOGCAP V program.

General Dynamics taps Graney to lead Electric Boat

General Dynamics said it has named Kevin Graney, who currently heads General Dynamics NASSCO, president of General Dynamics Electric Boat, effective Oct. 1.

O'Brien to serve as CFO of Raytheon Technologies

Toby O'Brien, the chief financial officer of Raytheon, will become CFO of the merged Raytheon and United Technologies company, dubbed Raytheon Technologies.

Maxar hires Shank

Maxar Technologies said it has named Chris Shank, the former director of the Strategic Capabilities Office, vice president of national security space.

The week ahead

Senior Pentagon officials are scheduled to speak around the Washington area this week as lawmakers look to begin conference negotiations on the defense authorization bill. The House is expected to vote on a stopgap continuing resolution, while the Senate continues deliberations on spending bills.

Lawmakers want Pentagon's grand strategy for defense industrial base vulnerabilities

Senate appropriators want a holistic Pentagon strategy for shoring up critical vulnerabilities in the defense industrial base, as lawmakers are concerned Office of the Secretary of Defense leadership and the military services aren't all on the same page in addressing challenges to the supply chain.

Senate bill adds $436M for U.S. military's new 5G technology development program

New legislation advancing through the Senate would allocate nearly half a billion dollars for the Defense Department's new program to research and develop fifth-generation wireless technologies.

DOD drags feet with open-source software program due to security, implementation concerns

The Defense Department has been slow to meet a government-wide mandate to release more open-source software code, as DOD officials have concerns about cybersecurity risks and are struggling to implement such a program across the department, according to a new audit.