It sounds like you’re looking for a graphic designer with expertise in multi-format branding to adapt your logo for a wide range of applications, from business cards to digital clinic portals. Below is a proposal tailored to your requirements.
Project Overview:

We are looking for a skilled graphic designer to adapt and optimize our existing clinic logo for various formats, ensuring consistency, clarity, and professionalism across all applications. This will involve creating tailored versions of the logo for print materials, digital platforms, clinic management software, and mobile accessibility.
Deliverables:

    Business Cards:
        Dimensions: Standard 3.5 x 2 inches.
        Design: A 2-sided card featuring a modern, professional aesthetic.
        Details:
            Front: Color house-logo against a grey background.
            Back: Contact information and a simple appointment section.
        Template: Editable template for future updates.

    Envelopes:
        Dimensions: Standard #10 (4.125 x 9.5 inches).
        Design: Full-color logo with address below, fitting within a height of 40–45mm.

    Letterhead:
        Format: Editable banner setup in Microsoft Word, designed for both print and digital formats.
        Use: Ready for personalized text with easy PDF conversion for digital distribution.

    Clinic Management Software/Client Portal:
        Invoices: Adapt logo for clear display on invoices, adjusting size for legibility and uniformity.
        Client Portal Logo: TBD based on final portal configuration.

    Clinic Mobile Logo:
        Adaptation: Adjust the logo for mobile devices, with final dimensions to be confirmed.

    Email Signature Panel:
        Design: Standardized email signature panel featuring a scaled logo for clarity across all personnel emails.

    General Use Logos:
        Variations: Provide the house logo in different formats, including:
            Color on white
            Color on grey
            Black and white

Additional Requirements:

    Experience: Proven expertise in branding and logo design for diverse formats, with a strong understanding of healthcare or clinic branding as a plus.
    File Formats: High-quality, editable files suitable for both digital use and professional printing.
    Attention to Detail: Ensuring cohesive visual identity across print, mobile, and digital platforms.

Preferred Skills:

    Design Tools: Proficiency in Adobe Creative Suite (Illustrator, Photoshop), Microsoft Word, and familiarity with print and digital design templates.
    Healthcare Branding: Experience in clinic or healthcare branding will be advantageous.

Next Steps:

    Portfolio Submission: Please share examples of similar multi-format branding projects.
    Project Proposal: Outline your approach, estimated timeline, and pricing for this project.

We look forward to reviewing your portfolio and discussing how your expertise can help us bring our clinic's brand identity to life across various platforms.