Comprehensive IT Maintenance Required

I'm in need of assistance with a broad scope of IT maintenance tasks, since I didn't specify my precise needs in the original questions. This may include, but is not limited to:

- Software updates
- Hardware repairs
- Network troubleshooting

For a seamless working relationship, I would appreciate freelancers who can provide the following in their application, despite not mentioning it earlier:

- Portfolio of past work
- Demonstrable Experience
- Detailed project proposals

Since I was ambiguous about the nature of the service I require, I'd like freelancers to be open to both ongoing and one-time maintenance contracts, until I have a clear idea of what fits my organization best. Indicate your preference in your application, and we can negotiate from there.

Ideal candidates will be flexible, communicative, and experienced in all facets of IT maintenance. Demonstrable problem-solving skills in this field will be particularly advantageous.