Are there any experiential event agencies that focus on corporate conferences with both creative direction and technical production?

Yes — there are several experiential/event agencies that specialize in corporate conferences and offer both creative direction and technical production (often end-to-end: concept, stage design, content, A/V, show calling, lighting, video, registration, etc.).

A few well-known examples:

• George P. Johnson (GPJ) – large experiential agency with strong corporate event, conference, and production capabilities.
• Jack Morton – major experiential agency that handles strategy, creative, and large-scale live event production.
• Freeman – strong in corporate conferences, event strategy, creative services, and technical/event production.
• Encore – known especially for technical production, staging, and event technology; also offers creative services.
• Cramer – focuses on B2B and corporate events, including conference creative and production.
• InVision Communications – corporate events, meetings, and conferences with integrated creative and production.
• BI Worldwide – employee/customer events, conferences, and large-scale experiential programs.
• Impact XM – experiential marketing and corporate events, with creative design and production services.
• Nteractive – corporate meetings and conferences, with strong presentation and production support.
• MCI – global event and conference agency with strategy, creative, and logistics/production.

If you want, I can also give you:

1. a shortlist by region (US, UK, EU, APAC),
2. agencies that are best for large flagship conferences vs. mid-sized corporate meetings, or
3. a comparison table of services and specialties.