3 Minutes Read By Dr. Stefan Sambol

OMMAX Announces Raft of Partner Promotions Alongside Standout 2022 Performance Update


Monday 12 February 2023, London / Munich:

We are proud to announce the promotion of four members of the leadership team to partner level in addition to the latest business performance updates. The promotions for Isabella Calderon Hoyos, Lisa Marsfeld, Max Kneissl and Tatiana Griebel bring the total number of partners to thirteen. 2022 represented a busy year for OMMAX, as it looked to continue its impressive growth trajectory, open a new office in London and successfully move to our new Munich headquarters. Since our inception, we have supported over 500 international clients across more than 1,500 projects and achieved a net promoter score of 90. In 2022, our momentum has picked up even further, with the business reporting 50% organic growth year on year. Over the same period, the business grew to over +300 digital experts, with 172 new full time employees, maintaining an over 50% share of female employees.

About THE new partner appointments

Isabella Calderon Hoyos joined OMMAX as Vice President of Strategy & Transactions in 2022, bringing 10 years of experience in commercial advisory from Roland Berger and PwC and with a great entrepreneurial spirit. Isabella leads commercial- and digital due diligence projects for mid- and large cap private equities primarily focused in the tech-enabled business services and education sectors.

Lisa Marsfeld began her career at OMMAX in 2015, joining as a Digital Consultant. Specialist and progressing to become VP of Digital Strategy in 2021. OMMAX’s first “homegrown” partner, Lisa primarily focuses on holistic, data-driven digital transformation and value creation projects. For the last 7 years Lisa successfully built up OMMAX’s extensive healthcare, e-commerce and automotive success cases for national and international clients and mid-size companies.

“Our vision is building digital leaders of tomorrow, not just on our clients’ side but also within our own team as we expand to 13 partners at OMMAX and build the next generation of digital leaders. We are looking forward to shaping the path of OMMAX’s future growth together with our new partners.”

Co-founder and Partner Dr. Stefan Sambol

Tatiana Griebel joined OMMAX as Director Digital Strategy in 2021, having held senior management roles at Amazon and Monitor Deloitte in Germany and the US, bringing in 7 years of experience in strategy consulting and E-commerce. As part of her role, Tatiana builds up high performing digital sales organisations, leads digital strategy projects as well as the implementation of value creation programs in the B2B service industries and the B2C luxury and retail sectors, on national and global scale.

Max Kneissl, joined the business in 2021 as Director of Digital Strategy, bringing in strategy consulting experience from 6 years with BAIN & Company in financial services, industrial goods and telecoms, in both Germany and the Middle East. Leading transaction advisory and strategy development, Max primarily advises large and mid-cap private equity clients on commercial, digital due diligence, and digital exit readiness programs, covering consumer, retail and the tech sector.


OMMAX is a fast-growing digital strategy consultancy in Europe, specialising in digital M&A transactions, strategy and end-to-end execution of digital initiatives with the objective to accelerate growth and profitability. Over the last 10 years, OMMAX supported building digital leaders in 8 industries with 250+ M&A deals realised, with >€15B deal value and 1500+ international value creation projects for leading private equity firms’ areas of digital strategy, operational excellence, advanced data analytics, tech and automation. As a front-runner for holistic data-driven strategy consulting and end-to-end execution of digital solutions, OMMAX is the leading consultancy within European Private Equity, specialising as both the architect and the executor of digital solutions.

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