Make sure your Google Business profile is setup properly. Encourage previous clients to give you a review there and post those on your site. Offer them a swag bag or something like that for positive reviews. When I did IT vendor work in the corporate world, survey results were everything and our bonuses were tied to them.
Reach out to a few other known tech blogs to write some guest articles for them or appear on podcasts, but make sure your site is linked somewhere on their page as part of the agreement.
Other techies don’t buy your services, just remember you have to impress the suits and give them good ROI, so reflect that in all your content.