
Kristyn Castello
KHR Executive AdvisoryEmployment attorney and SHRM-certified executive. Built People functions three times from zero, most recently scaling a health tech company from 50 to 150 people through its IPO.
Certified Fractional Partners
Certified People and Talent leaders who have built the function before, know your stage, and already know the system. You engage them directly, on their terms.
The first cohort
Contact them directly. You set the scope and the rate with them, and Nu|Erraa takes no cut.

Employment attorney and SHRM-certified executive. Built People functions three times from zero, most recently scaling a health tech company from 50 to 150 people through its IPO.

Two decades building People and Talent from the ground up, 30 to 600 people, pre-seed through Series C, across continents.

People and Talent leader who partners directly with founders to turn business goals into practical people strategies, from defining the first hires and building recruiting processes to shaping teams and coaching leaders. 15+ years across startups and high-growth tech, with experience at Google, Apple and NVIDIA.

Spots shifting trends early and says so plainly. Sets clear principles and keeps teams steady under pressure.

Often the first HR hire in the building. Has run the whole People function, from talent acquisition to culture, benefits and compliance, and scaled teams across India, Singapore, the EU, the UK and Canada for FinTech, AI, SaaS, consumer and gaming companies.

Helps founders build the People side before it becomes a bottleneck. A decade leading People and Talent for companies from 13 to 1,500 people, and 15 or more M&A transactions.

Over a decade building and leading People functions at every stage of growth. Tripled headcount while building the function at an early stage tech company, and built the rewards and onboarding systems that took a bootstrapped services firm from 150 to 750 people and an exit. Experienced with complex M&A integrations.
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Every partner above lists their own email, site and calendar. Contact whoever fits, and set the scope and the rate with them. If you would rather see the product first, book time with us.