He ran unsuccessfully for Governor of South Dakota in 2018, losing the Republican primary to Kristi Noem.

[1] He graduated cum laude from the South Dakota School of Mines and Technology in 1992 with his Bachelor of Science in electrical engineering.

At that time, he also served as a Special Assistant Attorney General for South Dakota prosecuting controlled substance felonies.

Senator John Thune to replace Steven K. Mullin as United States Attorney for the District of South Dakota and was nominated by President George W.

Nearly 3 years after Benda's death, Jackley charged Joop Bollen relating to the EB-5 scandal with five felony counts of unauthorized disposal of personal property to security interest.

Westerhuis was the business manager of Mid Central Educational Cooperative, which was contracted out by the state to distribute grant money.

The decision by the state came after a series of financial problems turned up in audits of the business that administered a program that encourages Native American Students to go to college, called GEAR UP.

[17] On Wednesday, June 4, 2014, one day after the losing the U.S. Senate primary, physician Annette Bosworth was arrested on charges brought by Jackley regarding perjury and filing false documents.

[22] On November 3, 2017, Judge Jon Brown granted Bosworth a suspended imposition of sentence, which means she no longer has any felonies on her record.

[30] In 2011, Division of Criminal Investigation (DCI) [an agency controlled by Jackley] agent, Laura Zylstra, filed a sexual harassment claim against a former Brown County deputy who made inappropriate comments towards her.

In September 2015, Zylstra sued DCI Director Bryan Gortmaker claiming she had been retaliated against with response to sexual harassment.

[34] Jackley claimed that the settlement was not being delayed and that Zylstra's lawyers and his gubernatorial opponent Kristi Noem were playing politics.

[36] In November 2016, Jackley declared his intention to seek the Republican nomination for Governor of South Dakota.

Jackley stated: “It’s Washington experience versus South Dakota experience.” “Marty’s background has been being a government lawyer,” Noem said.

When we talk about what’s been going on in Brookings with the Global Aquaponics scam—a con artist, Tobias Ritesman, held a fundraiser for Marty Jackley.

They’re schedule to begin jury trials in July—or, excuse me—June, June 26th and I plan on trying those personally, because that’s what a leader does.” [42] In the final debate, Jackley and Noem took questions about workforce development, anti-discrimination laws, drugs, uniting democrats and republicans in the state to make critical decisions and much more.

"Every time that a proposal comes forward to create a new 'blue ribbon' task force, a board or a commission, what typically comes with that is another layer of bureaucracy," Noem said.

Jackley spoke about putting together a task force to work on government transparency and open records laws.

"Days ago he stood up and talked about protecting victims while behind the scenes he was actively working to silence one to further his political career," Noem said.

[44] After the election, Jackley rejoined the firm of Gunderson, Palmer, Nelson and Ashmore and opened up a law office in Pierre, South Dakota.

[45] On August 27, 2019, Jackley was sworn in as the Jones County States Attorney after he was appointed to fill the vacancy left when Anita Fuoss resigned.

[51] On March 4, 2019, South Dakota Voice, a grassroots ballot question committee, headed by Cory Heidelberger, filed a lawsuit to stop IM 24.

[55] In 2020, it was reported that T. Denny Sanford, the richest man in South Dakota, was being investigated for possession of child pornography.

[58][59] On October 27, 2021, the South Dakota Supreme Court unanimously ruled against the "Implicated Individual" that search warrants that were sought will be unsealed, pending any motion(s) for rehearing.

[60] On November 17, 2021, the South Dakota Supreme Court unsealed records confirming that T. Denny Sanford was the implicated individual and that five search warrants were issued during the investigation.