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Jay Jubas

Senior PartnerTel Aviv

Advises the start-up and scale-up ecosystem, as well as telecommunications, media, and technology companies on growth strategies and transformation

Jay is a leader in McKinsey’s Technology, Media & Telecommunications Practice, and global leader of Fuel by McKinsey, which serves the start-up and scale-up ecosystem.

Recently, Jay helped several software-as-a-service (SaaS) companies activate growth strategies through entering new verticals, geographies, and adjacencies, or by implementing new pricing and packaging models. He helped an early-stage food company develop a new business model and a go-to-market model, as well as helping an insuretech provider successfully launch new markets. Jay also supported a leading global venture capitalist in its sales of a unicorn cybersecurity asset, and helped a fast-growth tech company drive revenue growth in its telecom vertical.

Jay has also led several large-scale transformation engagements, focused on improving operating expenditures, customer experience, and digital channels. He recently led the holistic transformation of a leading global media company, identifying $1 billion in operating-expenditure reduction, of which $650 million was saved in the first 18 months of implementation.

Jay also generated significant cost reduction and improved customer care metrics for telecom operators. He helped a large US wireless operator achieve over $4 billion in cost reduction while becoming a market leader on digital-related sales and customer care metrics, and a LatAm operator achieve $1 billion in cost reduction and improved Net Promoter Scores.

Jay has been an active speaker at industry conferences on a range of technology topics, and is passionate about growing value across the start-up and scale-up ecosystem. Jay holds a BS with highest honors and MS in materials science from Columbia University, and a PhD in physics from MIT. Prior to joining McKinsey, Jay worked as a research associate at MIT Lincoln Laboratory.

Published work

Maintaining a high-speed connection: A new playbook for cable growth,” McKinsey & Company, March 2020

The age of disruption reaches mobile operators,” LinkedIn, February 2018

Hello, mobile operators? This is your age of disruption calling,” McKinsey & Company, October 2017

A future for mobile operators: They keys to successful reinvention,” McKinsey & Company, February 2017 

Past experience

MIT Lincoln Laboratory
Research associate


PhD, physics

Columbia University
MS, materials science
BS, applied physics