Meet the people behind Xephyr

Lawrence Puang

Founder and CEO

Sydney

Leads client engagements at the intersection of commercial strategy, data platforms and applied AI, helping boards turn ambiguity into clear decisions and shipped outcomes. He has worked across retail and eCommerce, financial services, consumer goods, property, travel, healthcare and medical research, and private equity. Former executive at Quantium, where he led media and marketing analytics spanning ad targeting, measurement and partner growth, including work with Meta, Woolworths and NAB.

Scott Punshon

Founder and CTO

Sydney

Engineering lead and cloud architect with 20+ years designing, building and operating high-reliability systems. He has architected critical cloud and communications platforms for the Australian Federal Government, the Tasmanian Government and Telstra, and led teams delivering payment-transaction monitoring handling 10,000+ transactions per second across Visa, Mastercard and Amex. Teaches and guest lectures on big-data network monitoring at Macquarie University.

William Lam

Founder and CDAO

San Francisco

A technical leader with over a decade designing, building and deploying AI and analytics solutions for global companies in banking, retail and media. He was product and analytics lead for an award-winning Facebook in-store sales measurement product that linked supermarket and Facebook data so marketers could measure the impact of advertising on offline sales. His foundation is in data science and actuarial work.

Rachel Lollback

Senior Data and AI Consultant

Sydney

Xephyr's first hire, delivering solutions across Generative AI, project management, and analytics where creativity meets data.

Barry Sun

Lead Data Scientist

Sydney

Actuary-turned-data-scientist delivering actionable insights across Life Insurance, Travel, eCommerce, and Marketing.

Brian Giang

Lead Software Engineer

Vietnam

Designs and implements large-scale Big Data pipelines, ML systems, and LLM agents spanning DataOps, MLOps, and DevOps.

Evan Pham

Senior Software Engineer

Vietnam

9 years of engineering experience solving challenges across infrastructure, data orchestration, and web application development.

David Grogan

Principal Engineering Manager

Sydney

Builds AI-powered analytics tools that turn complex data into simple, intuitive conversations for businesses.

Kys Castellanos

Senior Data and AI Consultant

Sydney

Drives data strategy and marketing analytics across Retail Media, audience segmentation, and campaign measurement.

Jacob Hicks

Head of GTM and AI

Melbourne

Leads growth and go-to-market, turning enterprise AI, ML and data-science capability into practical revenue outcomes. Prior tech founder with private equity and tech sales roots.

Muhammad Sami

Lead Software Engineer

Melbourne

Ships production Python APIs and event-driven services on AWS, from backend engineering through CI/CD, Terraform and the site reliability practices that keep them shipping safely.

Ivan Paras

Software Engineer

Sydney

Software engineer working across C++, Java and Python, with leadership experience spanning professional and volunteer engineering teams.