• 2019, the company receives the Best Suburban Multifamily Design Award from the Minnesota Real Estate Journal for The Reserve at Arbor Lakes.
  • 2019, the company expands its geographic footprint to better service clients in Texas by opening a new office in the Dallas-Fort Worth area.
  • 2019, Sirish Samba is elected President of American Council of Engineering Companies (ACEC) of Minnesota. 

  • 2018, the company receives the Industrial Environmental Achievement Award from the Central States Water Environment Federation for its work on the GNP Company (Gold’n Plump) Wastewater Treatment Facility in Cold Spring, MN. 

  • 2018, the MnDOT Office of Civil Rights recognizes Sambatek, Inc. as a Transportation Leader Advancing Equity for a Minority Owned Business.
  • 2018, the company designs its first solar project in Waite Park, MN. 
  • 2017, the company provides engineering consulting services for the MnDOT I-35W rehabilitation project.
  • 2016, the company celebrates its 50th Anniversary.
  • 2016, the company completes site grading design and street utility work for the U.S. Bank Stadium in Minneapolis, MN. 

  • 2015, the company provides engineering and surveying services for the METRO Transit Blue Line Extension (Bottineau Corridor) LRT project.
  • 2014, the company changes its name from MFRA, Inc. to Sambatek, Inc.
  • 2014, the company receives recognition as the 48th fastest growing AE firm in the Nation according to the ZweigWhite Hot Firm List.
  • 2013, the company provides preliminary design services for the METRO Green Line Extension (Southwest Corridor) LRT project. 

  • 2012, the company provides design services for the METRO Transit Green Line (Central Corridor) LRT project from downtown Minneapolis to downtown St. Paul.
  • 2010, the company enters the wind industry by providing services for the 130 MW Taloga Wind Farm in Putnam, OK, and the 51 MW Kit Carson Wind Farm in Burlington, CO. for Wanzek Construction. 



  • 2009, company changes its name from McCombs Frank Roos Assocates, Inc. to MFRA, Inc
  • 2009, MFRA, Inc. receives DBE and MBE Certifications. Sirish Samba champions efforts of restructuring company ownership from private equity ownership to a firm owned and operated by employee shareholders.
  • 2009, the company completes design on the prominent West End retail center in St. Louis Park, MN. 

  • 2008, Jeff Roos retires.
  • 2008, Sirish Samba, PE is appointed President & CEO.
  • 2006, the company acquires Schoell & Madson, Inc.
  • 2005 Corey Bergman, Principal joins the company.
  • 2005, a private equity group acquires McCombs Frank Roos Associates, Inc.
  • 2004, Mark Anderson, Principal joins the company.
  • 2002, the company is retained by OPUS and RED Development for site design of The Shoppes at Arbor Lakes, the Twin Cities’ first “lifestyle center” mixed-use development in Maple Grove. 

  • 2000, the company receives the American Planning Association of MN Distinguished Planning Award for the Comprehensive Park Trail & Area Plans for Saint Michael, MN.



  • 1997, Erik Miller, Principal joins the company.
  • 1996, design and construction management of the St. Michael Wastewater Treatment Facility is completed. The project receives the Consulting Engineers Council Grand Award and the Seven Wonders of Minnesota Award. 
  • 1994, current President and CEO Sirish Samba joins McCombs Frank Roos Associates as an Engineer-in-Training.
  • 1993, Skip McCombs retires.
  • 1992, Greg Frank becomes President & CEO of McCombs Frank Roos Associates, Inc.
  • The company acquires Hult Associates, LLC to expand its survey services.



  • The Water Resources and Hazardous Waste Division is established to provide groundwater contamination plume modeling services.
  • 1987, Greg Frank, Jeff Roos, and Paul Johnson become partners of McCombs-Knutson Associates, Inc. to recognize this transition, the company name was changed to McCombs Frank Roos Associates, Inc.
  • 1984, the company receives the Consulting Engineers Council of MN Grand Award for the design of the Wastewater Treatment Facility for the Village of Turtle Lake, WI.
  • 1984, Dickman Knutson retires.
  • The company acquires Midwest Engineering, LLC.



  • 1977, the company receives the Consulting Engineers Council of MN Grand Award for the Nursery Irrigation System at Crow Hasan Nursery, Hennepin County Park Reserve District.
  • 1974, the company receives the Consulting Engineers Council of MN Honorary Award for design of the Chaska Wastewater Treatment Plant in Chaska, MN.
  • 1973, Principal Paul Pearson joins the firm and is still recognized as the longest tenured employee of 43 plus years.



  • In 1966, U.S. Navy veteran Williams (Skip) McCombs, a professional civil engineer and Dickman Knutson, a professional land surveyor, start McCombs-Knutson Associates, Inc. in Plymouth, MN.