Jason Grant
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Professional journey

A collection of experiences that shaped my approach to product design, design systems, leadership, and design engineering.
01/2025 - Present
Head of Product DesignHi Marley
Reoriented the design team around scalable systems, frontend-first workflows, and AI-enabled tooling. Envisioned and prototyped future product directions in Nextjs to validate with customers, align stakeholders, and accelerate decision-making. Launched a company-wide design system and led redesigns from concept through internal and external validation.
08/2023 - 01/2025
Director of Product Design (Fractional Interim VP)Klaviyo
Stepped in as a fractional interim VP of Design to lead quality, clarity, and maturity across an 80-person team. Focused on driving design feedback, IC/manager growth frameworks, and cross-functional alignment. Enabled global scalability through strategic internationalization (5 languages) and guided product growth efforts across SMS/email parity, pricing experiments, and feature announcement patterns.
08/2023 - 07/2024
Adjunct ProfessorEndicott College
Taught UX courses in the Graphic Design Program, preparing students for careers in experience design through real-world, design and systems-focused projects.
07/2021 - 08/2023
Senior Manager, Design Systems and Content DesignKlaviyo
Built and scaled Ascent Design System, Content Design, and Internationalization from scratch—growing three teams to 16 ICs and 2 managers during a phase of rapid org expansion. Led end-to-end systems work across tokens, components, accessibility, and i18n, while implementing scalable practices like 6-week planning, async reviews, and readiness checklists. Drove product modernization, rebrand execution, and consistent adoption through playbooks, specs, and contribution processes.
03/2017 - 07/2021
Head of UX DesignVertex Pharmaceuticals
Founded and scaled Vertex’s internal design practice across R&D, Clinical, Commercial, and Enterprise teams—delivering 100+ projects and leading design ops. Launched an internal design system, created shared libraries and playbooks, and drove the Lab of the Future vision to unify hundreds of scientific apps into platformed experiences that enabled better data and AI readiness. Built organizational design maturity through a monthly Human-Centered Design education series.
05/2014 - 03/2017
Head of UX DesignCollaborative Consulting (now part of CGI)
Led design strategy and team growth across diverse client verticals including retail, biotech, finance, and government. Productized front-end accelerator assets used in over $4M in consulting sales, while delivering high-impact UX engagements and scaling team capability through reusable templates, process improvements, and hands-on mentorship.
11/2011 - 05/2014
Product Strategy Lead, AEC SolutionsDassault Systèmes
Led product strategy and multi-year roadmapping for Dassault’s AEC portfolio, aligning cross-functional teams across cloud and desktop products. Identified and prioritized opportunities through customer research and market analysis, driving POC and MVP development. Delivered go-to-market content and represented the division at executive briefings and industry forums to accelerate adoption and strategic alignment.
Jason Grant
Home
Experience
Writing
GitHub
LinkedIn
Substack
Bluesky

Professional journey

A collection of experiences that shaped my approach to product design, design systems, leadership, and design engineering.
01/2025 - Present
Head of Product DesignHi Marley
Reoriented the design team around scalable systems, frontend-first workflows, and AI-enabled tooling. Envisioned and prototyped future product directions in Nextjs to validate with customers, align stakeholders, and accelerate decision-making. Launched a company-wide design system and led redesigns from concept through internal and external validation.
08/2023 - 01/2025
Director of Product Design (Fractional Interim VP)Klaviyo
Stepped in as a fractional interim VP of Design to lead quality, clarity, and maturity across an 80-person team. Focused on driving design feedback, IC/manager growth frameworks, and cross-functional alignment. Enabled global scalability through strategic internationalization (5 languages) and guided product growth efforts across SMS/email parity, pricing experiments, and feature announcement patterns.
08/2023 - 07/2024
Adjunct ProfessorEndicott College
Taught UX courses in the Graphic Design Program, preparing students for careers in experience design through real-world, design and systems-focused projects.
07/2021 - 08/2023
Senior Manager, Design Systems and Content DesignKlaviyo
Built and scaled Ascent Design System, Content Design, and Internationalization from scratch—growing three teams to 16 ICs and 2 managers during a phase of rapid org expansion. Led end-to-end systems work across tokens, components, accessibility, and i18n, while implementing scalable practices like 6-week planning, async reviews, and readiness checklists. Drove product modernization, rebrand execution, and consistent adoption through playbooks, specs, and contribution processes.
03/2017 - 07/2021
Head of UX DesignVertex Pharmaceuticals
Founded and scaled Vertex’s internal design practice across R&D, Clinical, Commercial, and Enterprise teams—delivering 100+ projects and leading design ops. Launched an internal design system, created shared libraries and playbooks, and drove the Lab of the Future vision to unify hundreds of scientific apps into platformed experiences that enabled better data and AI readiness. Built organizational design maturity through a monthly Human-Centered Design education series.
05/2014 - 03/2017
Head of UX DesignCollaborative Consulting (now part of CGI)
Led design strategy and team growth across diverse client verticals including retail, biotech, finance, and government. Productized front-end accelerator assets used in over $4M in consulting sales, while delivering high-impact UX engagements and scaling team capability through reusable templates, process improvements, and hands-on mentorship.
11/2011 - 05/2014
Product Strategy Lead, AEC SolutionsDassault Systèmes
Led product strategy and multi-year roadmapping for Dassault’s AEC portfolio, aligning cross-functional teams across cloud and desktop products. Identified and prioritized opportunities through customer research and market analysis, driving POC and MVP development. Delivered go-to-market content and represented the division at executive briefings and industry forums to accelerate adoption and strategic alignment.