Marcus & Millichap

Sean O'Brien


Sean O'Brien is an Office and Industrial investment specialist in Chicago. Professional landlords across the country rely on Sean for an accurate perspective of the investment market in real-time. During the acquisition and disposition underwriting process, and during critical points of lease renewals, Sean assists owners in creating or preserving wealth based upon each individual client's strategy and lifestyle.

Chicago Oak Brook
Sean O'Brien

Sean O'Brien

Tel: (630) 570-2153
Fax: (630) 570-2210

License:  IL  475.155235

Member - National Office and Industrial Properties Group

Joined Marcus & Millichap as an agent in August of 2012.

University of Northern Colorado, Marketing

Current Listings
U.S. Bank Office Building - Marshall, MN
DistributionNow Warehouse - South Holland, IL

Notable Sales
FedEx - Distribution Facility – Cary, IL 
FedEx - Distribution Facility – Mt. Pleasant, IA
Motion Industries – Distribution Facility – Gary, IN 
Adventist Health Partners – Medical Office - Berwyn, IL
Fasco, Inc – Distribution Facility – Alsip, IL  
Dunkin Donuts - Hamilton, OH
Single Tenant Industrial Building - Westmont, IL

Transactions Closed

  • Nordstrom Office Building

    Nordstrom Office Building

    Single-Tenant Office

    Centennial, CO
    Size: 01 units

  • State House Inn

    State House Inn


    Springfield, IL
    Size: 125 units

  • Coram Specialty Infusion Services

    Coram Specialty Infusion Services

    Single-Tenant Office

    Machesney Park, IL
    Size: 30,000 sqft

  • Option Care & Universal Hospital Services

    Option Care & Universal Hospital Services

    Single-Tenant Office

    Machesney Park, IL
    Size: 30,000 sqft

  • Fresenius Chicago Southside

    Fresenius Chicago Southside

    Single Tenant Office Medical

    Chicago, IL
    Size: 10,947 sqft

  • Vacant Warehouse

    Vacant Warehouse

    Industrial Vacant/User

    Wheeling, IL

  • Fasco Fasteners, Inc.

    Fasco Fasteners, Inc.

    Single-Tenant Industrial

    Alsip, IL
    Size: 50,483 sqft

  • FedEx Express - Corporate Guarantee

    FedEx Express - Corporate Guarantee

    Single-Tenant Industrial

    Cary, IL
    Size: 27,300 sqft

  • 740 Burr Oak Drive

    740 Burr Oak Drive

    Single-Tenant Industrial

    Westmont, IL
    Size: 39,790 sqft

  • Sherwin-Williams


    Net Leased Miscellaneous

    Peoria, IL
    Size: 9,520 sqft

  • Advanced Disposal - 5% Annual Rent Increases

    Advanced Disposal - 5% Annual Rent Increases

    Single-Tenant Industrial

    Palatine, IL
    Size: 10,995 sqft

  • FedEx Express

    FedEx Express

    Single-Tenant Industrial

    Mount Pleasant, IA
    Size: 16,700 sqft

  • Single-Tenant Industrial Building

    Single-Tenant Industrial Building

    Single-Tenant Industrial

    Portage, IN
    Size: 24,415 sqft

  • Dunkin' Donuts (Ground Lease)

    Dunkin' Donuts (Ground Lease)

    Net Leased Restaurant

    Hamilton, OH
    Size: 2,139 sqft

  • Motion Industries Portfolio

    Motion Industries Portfolio

    Single-Tenant Industrial

    Gary, IN
    Size: 15,000 sqft

  • Motion Industries

    Motion Industries

    Single-Tenant Industrial

    Chicago Heights, IL
    Size: 10,000 sqft

  • Adventist Health Partners

    Adventist Health Partners

    Office Medical

    Berwyn, IL
    Size: 2,475 sqft