Jonathan Mueller
Managing Director
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- Full Name
- Jonathan Mueller
- Title
- Managing Director
- Firm
- Onex Corporation (Onex Partners)
- Firm Type
- Private Equity (large-cap buyout / corporate investing) — *note: the "Angel Investor / Seed" labels in the source stub are not supported by any evidence found; all sources describe Onex Partners private-equity work*
- Investment Stage
- Control buyouts and corporate acquisitions (not seed/early-stage)
- Sector Focus
- Aerospace, industrials/automation, transportation
- Geographic Focus
- Europe, with origination in German-speaking markets (DACH)
- Location
- London, United Kingdom
Background
Jonathan Mueller is a Managing Director at Onex Corporation, the Toronto-headquartered private equity and alternative asset management firm. He joined Onex in 2011 and was promoted to Managing Director in January 2019. Within Onex Partners, the firm's large-cap private equity platform, he has been responsible for the firm's efforts in the automation, aerospace and transportation industries across Europe, and supports origination in the German-speaking region. Onex's press materials describe him as focused on European buyout activity in aerospace and industrials.
Before joining Onex, Mueller worked at The Boston Consulting Group in Zurich, Switzerland. He holds an M.B.A. from Harvard Business School and a B.A. in Business Administration from the University of St. Gallen, Switzerland. Public profile aggregators also note a Goldman Sachs summer associate stint around 2010, consistent with an M.B.A. internship.
Over his tenure, Mueller has worked on a number of Onex portfolio investments and has held board seats tied to those holdings. He has served as a director of WireCo WorldGroup and Meridian Aviation, and previously sat on the boards of KraussMaffei Group and WestJet. His work reflects Onex Partners' strategy of acquiring control positions in established, often complex industrial and aviation businesses and driving operational value creation, rather than early-stage venture or angel investing.
Investment Thesis & Focus
- Operates within Onex Partners, which makes large equity investments to acquire control positions in established mid- to large-cap companies — a strategy fundamentally different from seed/angel investing.
- Sector emphasis: aerospace, industrial manufacturing and automation, and transportation.
- Geography: European deal origination and execution, with particular strength in the German-speaking (DACH) region given his BCG Zurich and St. Gallen roots.
- Value creation orientation: takes board seats and works on portfolio companies post-acquisition (WireCo, Meridian Aviation, KraussMaffei, WestJet), consistent with Onex's hands-on, operationally intensive buyout model.
Notable Investments
- WestJet — Canadian airline; Onex acquired it in a ~C$5 billion take-private completed in 2019. (Mueller served on the board.)
- KraussMaffei Group — German plastics and rubber processing machinery maker; Onex-era holding later sold to China National Chemical Corporation (ChemChina) in 2016. (Mueller was a former director.)
- WireCo WorldGroup — manufacturer of wire rope and synthetic rope products for industrial and offshore markets. (Mueller was a director.)
- Advanced Integration Technology (AIT) — provider of aerospace factory automation and tooling systems; an Onex investment Mueller worked on.
- BBAM — one of the world's largest aircraft leasing/management platforms; an Onex investment Mueller worked on.
- Meridian Aviation — aviation-sector holding on whose board Mueller served.
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