Our Story

Look back with pride. Look forward with anticipation.


Trissential was born in 2003, as an idea to create a third alternative for the consulting industry – the sweet spot between large SIs and local staffing firms. We grew deep roots, establishing ourselves in Minnesota, then expanding to Wisconsin and Illinois.

SQS (Software Quality Systems AG) the leading Quality specialist for digital business, acquired Trissential in 2015, adding quality testing services to Trissential’s capabilities and launched Trissential’s business model globally.

In 2018, Assystem Technologies acquired SQS to form a single organization, then rebranded into Expleo in 2019. Expleo, our parent company, is now the unique provider of end-to-end, integrated engineering, quality services & management consulting for digital transformation.

Trissential, an Expleo Company, stands strong in the United States. We are still the same trusted partner focusing on value to the client and consultant. Now with 15,000 people strong in 25+ countries, we have expanded our global reach and enhanced our industry depth.  

  • 2021

    Trissential goes global

    Working with Expleo, Trissential is taking our capabilities to the world

  • 2019

    Parent company launches under new brand

    SQS & Assystem Technologies becomes Expleo - Trissential is an Expleo Company

  • 2018

    Acquisition by Assystem

    Assystem Technologies, leading international engineering organization, acquires SQS

  • 2017

    Rapid acceptance

    Quality Assurance becomes one of Trissential’s strongest capabilities

  • 2016

    QA & ET

    Quality Assurance & Enterprise Transformation practices readily accepted by the market

  • 2015

    Acquisition by SQS

    SQS, the leading Quality specialist for digital business, acquires Trissential

  • 2014

    Third office

    Trissential expands its Midwest presence with an office in Chicago

  • 2011

    First anchor account

    Client whose partnership with Trissential exceeds $2M in revenue

  • 2007

    100th Essentialist™

    Trissential welcomes our 100th team member

  • 2005

    Second office

    Trissential expands to Milwaukee

  • 2004

    Growth in Minnesota

    Trissential hires Jim Mohs - first full-time sales person to support Minnesota office

  • 2003

    Founded

    Trissential created by Keith Korsi and Mike Vinje. Nine months later, the first clients are signed and first Essentialists™ are hired to Minneapolis office

  • 2002

    The idea

    The consulting industry needed another option – “a one stop shop” different from large SIs and local staffing firms