Oregon State announced Monday the hiring of four more assistant coaches, bringing on a defensive coordinator, a former OSU great and two Hawaii assistants.

Wisconsin outside linebackers coach Tim Tibesar will be the OSU defensive coordinator.

The 45-year-old former All-American linebacker at North Dakota has spent the past three years at Wisconsin coaching under Paul Chryst. Chryst was twice the Oregon State offensive coordinator, overlapping with Beavers head coach Jonathan Smith when Smith was a quarterback and graduate assistant.

Three former Wisconsin players coached by Tibesar have been selected in the NFL draft: T.J. Watt, Vince Biegel, and Joe Schobert. The Badgers have ranked no worse than fourth in scoring defense each of the past three seasons, including in 2017 when they went 12-1 and qualified for the Orange Bowl.

Tibesar has previous coaching experience as the Chicago Bears linebackers coach (2013), Purdue defensive coordinator (2012), Montreal Alouettes linebackers coach and defensive coordinator (2009-11), Kansas State special teams coordinator and defensive coordinator (2006-08), and North Dakota linebackers coach and defensive coordinator (2001-05).

As reported by The Oregonian/OregonLive and other outlets on Dec. 5, former Oregon State linebacker Trent Bray will join the Beavers staff. OSU announced Monday that Bray will coach linebackers.

Bray spent the past three seasons at Nebraska as linebackers coach under Mike Riley and served as the interim coach after the school fired Riley on Nov. 25. Riley is now the assistant head coach to Smith at Oregon State, his third stint at the school.

Like Smith, Bray built a resume as one of the best players in OSU history. He ranks sixth in school history with 337 career tackles during his career from 2002-2005. Smith was a graduate assistant with Oregon State from 2002-03.

Bray, 35, coached linebackers at Oregon State under Riley from 2012-14. He previously served as a graduate assistant at Arizona State under Dennis Erickson in 2009 and was promoted to linebackers coach from 2010-11.

Additionally, the Beavers will hire Hawaii defensive coordinator Legi Suiaunoa to coach the defensive line and Hawaii receivers coach Kefense Hynson to take the same role at OSU.

Suiaunoa coached with Smith at Montana in 2011, serving as the defensive line coach while Smith was the Grizzlies' offensive coordinator and quarterbacks coach. Suiaunoa remained at Montana through the 2015 season before going to Hawaii to serve in the same role. He was promoted to defensive coordinator prior to the 2017 season.

Hynson joined Suiaunoa on the Montana staff in 2012 as tight ends and special teams coach. Montana promoted Hynson to co-offensive coordinator and quarterbacks coach from 2013-14. He coached wide receivers at Norfolk State in 2015 and Hawaii from 2016-17.

The Beavers have hired eight assistant coaches two days before the start of the three-day early signing period on Dec. 20. Teams can hire a 10th assistant starting on Jan. 9, 2018.

Oregon State does not yet have a coach officially assigned to running backs or the secondary. The team has a $3.3 million annual salary pool available for their coaching staff, according to a memorandum of understanding Smith signed upon returning to OSU.

Below is a look at the current Oregon State football staff.

Head coach: Jonathan Smith

Assistant head coach: Mike Riley

Offensive coordinator/quarterbacks: Brian Lindgren

Associate head coach/offensive line: Jim Michalczik

Wide receivers: Kefense Hynson

Defensive coordinator: Tim Tibesar

Defensive line: Legi Suiaunoa

Linebackers: Trent Bray

Special teams: Jake Cookus

-- Danny Moran