Aurora Veterans' Affairs
|November 13, 2017—present|
| Vice Chair|
Libertarian Party of Colorado
|April 28, 2019—present|
|Education:||Rocky Mountain College of Art + Design|
|Military:||United States Army|
On November 2 2017, Mulder was appointed by the city council of Aurora to a term on its Veterans' Affairs Commission.
- Aurora Veterans' Affairs Commission
- Public Outreach Committee (November 2017—present), Chair (January 2018—present)
- Vice Chair (April 2019—present)
- 2017, 2018, 2019 Convention Planning Committee- Graphics Consultant
- 2018, 2019 Convention Sergeant-At-Arms
- Fundraising Director (March 2017—November 2017)
- Policy Manual Committee- Chair (August 2017—November 2017)
- Style & Bylaws Committee (August 2018—present)
- Chair (April 2018—present)
- Outreach Director (April 2017—April 2018)
- At-Large Representative (October 2018—Present) (Inaugural)
2018 Campaign for Arapahoe County Sheriff
Main article: Eric Mulder Arapahoe County Sheriff Campaign 2018
On December 26 2017, Mulder filed to run for Sheriff of Arapahoe County. For his nominee for Arapahoe County Undersheriff, Mulder selected Sarah Daggers. He received the nomination of the Libertarian Party of Arapahoe County on April 7, 2018.
On November 6, 2018, Mulder received approximately 5% of the vote, placing him in third behind incumbent Sheriff Dave Walcher and Democratic winner Tyler Brown.  He has publicly expressed interest in running for Sheriff in 2022.
|Republican||David Walcher (Incumbent)||43.41%||113,271|
2018 Campaign for Mayor of Aurora (Special Appointment)
On May 24 2018, Mulder (along with 13 other candidates) applied with the city of Aurora, Colorado to fill the remainder of Mayor Steve Hogan's term, who passed away on May 13. The City Council had 45 days from Mayor Hogan's vacancy to select a new mayor (Mayor Hogan's term expires in 2019).
On June 25, 2018, Aurora City Council Member Bob LeGare was selected to be Aurora's interim mayor.
- Sentinel Colorado (May 28, 2018)
- LawWeek Colorado (May 29, 2018)
- KUSA 9News (May 30, 2018)
- Sentinel Colorado (May 30, 2018)
2019 Campaign for Libertarian Party of Colorado Vice Chair
On April 28, 2019, Mulder was elected.
- Lance Cayko, Libertarian Party of Colorado Communications Director.
- Matthew DiGiallonardo, former Libertarian Party of Colorado Membership Director. 2019 Candidate for LPCO Chair.
- Caleb Dyer, former Representative of the New Hampshire House of Representatives, District 37
- Justin Mathew, former Fundraising Director of the Libertarian Party of Colorado.
- Victoria Reynolds, Libertarian Party of Colorado Fundraising Director. 2019 Candidate for LPCO Chair.
- James Treibert, 2018 Libertarian Nominee for CU Regent At-large.