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David Mazzarri

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Hi, I’m David Mazzarri. I’m a senior writer and creative producer with 15+ years of experience crafting story-driven content across video, audio, digital, and branded formats.

About

Hi, I’m David Mazzarri. I’m a senior writer and creative producer with 15+ years of experience crafting story-driven content across video, audio, digital, and branded formats. I translate complex creative work into clear narratives that support brand growth, audience engagement, and commercial goals. I’m an avid collaborator, working with designers, motion teams, creative directors, and global stakeholders in fast-paced, remote environments. In recent years I’ve focused on AI training, TV and game storytelling, and cross-border media ventures that connect Latin American and North American audiences.

I thrive at the intersection of craft and strategy, using data-informed pacing, tone calibration, and audience insights to guide development from concept to distribution. I love building scalable writing teams and editorial systems, and I’m comfortable leading multilingual, multicultural projects across the U.S., LATAM, and Europe.

  • 21 years' experience
  • Joined December 2025

Skills· 1

Languages

  • EnglishFluent
  • Spanish; CastilianFluent

Industry experience

  • Media & Entertainment
  • Gaming
  • Professional Services
  • Software & Internet
  • Education

Work experience· 11 roles

Generalist Writer/LLM humor&Tone trainer · MERCORSep 2025 – Present · 1 yr 3 mos

Contributed to advanced AI training initiatives by developing system instructions, golden responses, and structured annotations to refine large language model writing capabilities. Designed and authored high-quality prompt-response pairs to train AI systems in narrative structure, tone calibration, clarity, and stylistic consistency. Led a specialized humor-focused training project, rewriting AI outputs to enhance wit, timing, and tonal nuance while defining contextual boundaries for appropriate humor use. Provided editorial oversight on model outputs, identifying linguistic inconsistencies and improving coherence, voice alignment, and user engagement. Applied structured evaluation frameworks to assess response quality, ensuring alignment with user intent, brand tone, and contextual sensitivity. Collaborated in iterative feedback cycles to improve model performance across creative, conversational, and instructional use cases.

Copywriter/Campaign Writer · Talky HatFeb 2025 – Sep 2025 · 8 mos

Developed brand messaging and crafted 200 engaging, interchangeable messages for a novel line of trucker hats designed to foster connections among wearers. Contributed to product design by collaborating on material selection, aesthetic elements, and overall market positioning to enhance appeal and user engagement. Led the development of a 12-month multimedia campaign, creating over 100 assets—including video, audio, and social media content—optimized for all platforms to drive high engagement and brand visibility.

Copywriter/Campaign Writer · Talky HatSep 2024 – Feb 2025 · 6 mos

Developed brand messaging for a novel line of trucker hats and contributed to product design, including material selection and aesthetics. Led a 12-month multimedia campaign, producing over 100 assets across video, audio, and social platforms to boost engagement and brand visibility.

Creative Lead / Marketing Lead/ Writer · Pocket FM, US & LATAM DivisionFeb 2022 – Apr 2025 · 3 yrs 3 mos
Creative Lead / Senior Writer, U.S. & LATAM Expansion · Pocket FMFeb 2022 – Apr 2025 · 3 yrs 3 mos
Writer/Producer · Open Studios, LLCMay 2017 – Feb 2025 · 7 yrs 10 mos
Writer/Producer · NEW NEBULA CONTENT, LLCApr 2015 – Present · 11 yrs 8 mos
Writer/Director/Producer · Liberman Broadcasting/ Estrella TV, INCMay 2012 – Dec 2015 · 3 yrs 8 mos

Education

Film and Production · Universidad de los Andes (VE)2000 – 2003
Electrical Engineering · Universidad de los Andes (VE)1998 – 2002

Certifications and awards

WGA Writer2018 – 2026

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