Marcus Mahlen

Office: (605) 444-7116

Fax: (605) 357-7102

Mobile: (605) 228-9744

Scope of Service

Marcus Mahlen joined NAI Sioux Falls in February of 2017 as a broker associate.  He comes to NAI with a significant amount of sales experience in the office technology industry.  Since earning his degree in 2015, Marcus has received experience working in economic development for the City of Harrisburg, as well as managing his own sales territory for a reputable company based out of Sioux Falls.  His drive for economic development and community growth is what brought him into commercial real estate and he will channel this passion into serving his clients with their best interest in mind.

Education & Professional Experience

Marcus received his Bachelor of Business Administration with an emphasis in Business Marketing from the University of South Dakota in May of 2015.  He also received a minor in Political Science.

Marcus is very familiar with the process of servicing a client and completing a transaction from start to finish.  While working in the office technology industry, he was involved in countless transactions with different industry professionals and business owners.  He looks forward to continuing this mode of service in the utmost professional manner with all his clients at NAI Sioux Falls.

Professional Affiliations & Designations

  •  Licensed Real Estate Broker, State of South Dakota

Community Involvement

  • Sioux Falls Area Young Professional Network Steering Committee
  • YPN Civic Engagement Committee Co-Chair
  • 2018 Sioux Falls School Board Facilities Task Force Member
  • Sigma Alpha Epsilon Sioux Falls Area Alumni Association President
  • Sioux Empire United Way Emerging Leader
  • 2018 Sioux Council Friends of Scouting Co-Chair
  • Active Yelduz Shriner
  • Leadership South Dakota Class of 2018-2019 Participant

What People Are Saying About Marcus

"We needed a specific type of warehouse space, Marcus continued searching until he found one that worked for our needs. He is a true professional."  

Keith Auch
Reclamation Technologies, Inc

"When it comes to real estate deals, my office was small potatoes. Even though the deal was not big, and the negotiations were a little tense, Marcus was cooler than a trillion ton iceberg and got the deal everyone was happy with."

Josh Tordsen
Gigastrand Technologies

"As a church we have very specific needs, strict budgets, and lots of red tape to get through when it comes to real estate transactions. Marcus and NAI were phenomenal every step of the way - they were patient, easy to work with, and got things done promptly. We couldn't have had a better experience."


Jeff Mueller, Pastor

Restore Church - Yankton

Jeff Mueller, Pastor
Restore Church - Yankton

“I had been searching for the right office for my small business for several months and had worked with a few different property management companies without any success. That was until I worked with Marcus [Mahlen]. Marcus took an entirely different approach from other commercial real estate brokers and took the time to precisely understand what our needs were and provided an office solution that exceeded my expectations. What is more, Marcus made the entire process of leasing an office space straight forward and effortless. I could not recommend Marcus and NAI highly enough." 

Nathan Fredrickson
EPI - Director of Investigations & Risk Management

“Our Church made a difficult decision to not build a new building but rather look for an existing building or space to remodel instead.  Finding an existing building or space to fit a church can be extremely difficult.  Marcus took the time to listen to the specific needs and wants of the church before attempting to locate properties.  That approached help narrow the search for him and helped us keep an open mind on the options presented.  In the end we found the right fit and Marcus made it happen.  We are very appreciative of Marcus’ thorough approach and professionalism.” 

Galen Van Otterloo
Arise Church

"Thank you Marcus for your efforts on the sale of our property in Ipswich SD. NAI of Sioux Falls, and yourself, were a great team to help us with this sale. Everything was very professional, and the communication was superb. It is so nice to get answers when needed, and in a timely manner. We will certainly use you in our next need for selling one of our properties. I will not hesitate to refer you to anyone looking for help as well!"

Dirk Swanson
Double L Investments - Aberdeen, SD

“Marcus was informative and kept us in the loop throughout the whole process, which made the transaction that much easier. We couldn’t have asked for a better agent!”

Mandy Rounseville
Sioux Falls Audiology Associates

"Marcus is a true team player that puts client needs over his own! I had a tight timeline to find an office and not much knowledge of downtown office space and what I actually wanted or needed. However Marcus made himself available immediately and he quickly understood my needs, making them his focus. Even though the properties he was currently responsible for didn't meet my needs, Marcus made sure that NAI did by unselfishly connecting me with another team member who represented a more appropriate space. His market knowledge, willingness to collaborate, and focus on understanding/meeting client needs with urgency really simplified the process for me. I would highly recommend Marcus!"

Brandon Eastman
Top Talent Connection, LLC