Before starting my current full-time position with Automattic, I was a freelance web developer. While I no longer take on new projects; I have a number of excellent colleagues who I very happily recommend. This list isn’t exhaustive as there are hundreds of great WordPress & web professionals out there, but these are the folks that I have either worked with, met with in person or happen to know are extra good.

Design & branding:

• Don Ciuchete
• Sara Cannon
• Rachelle Sartini Garner

Copywriting, SEO, quality assurance, support and documentation

• Rob La Gatta
• Kirsten Weisenburger/PermanentPress
• Siobhan McKeown/Words for WP
• DeepNetMedia (specialized in SEO)

Theming, front-end & WordPress development

• bluelime media/Christine Rondeau
• Jonah Coyote Design
• Fsquare Design/Flynn O’Connor
• Cafe Noir Design/Shannon Smith
• Nudge Design
• DesignFaire/Vanessa Chu

WordPress/PHP/backend & plugin development:

• SFN Design/Curtis McHale
• Pete Mall
• Jared Atchinson
• Pier-Luc Petitclerc
• Chris Bavota

Have you been hacked, need a security audit or want to protect/backup your site?

• Mark Jaquith
• Sucuri.net
• VaultPress
• BackupBuddy

Full-service agencies:

• ModernTribe Inc.
• StressLimit Design
• 10up

Domain registration, hosting & related services:

• WordPress.com
• Hover.com
• MediaTemple
• WPEngine
• eDigest
• CloudFlare

If none of the folks above suit your needs, or you want even more individuals or agencies to browse through, you should take a look at the Code Poet directory, the WP Candy Pros or make a job posting at jobs.WordPress.net.