Dear,
As a Geospatial and mapping Specialist with over 12 years in the web maping fields, i can Ensure the developpement of the desired map based to leaflet API( Open source solution).
The map will be Responsive that overlay your marker in Cluster or Heat maps with GPS Current location , Zoom Toolbar, Layer Switcher with Multiple Base map as background eg OpenStreetMap, Bing Satellite etc.
Please Could You confirm the current link is you data or you have Other data to be Overlayed in the map.
I look forward to get hearing from you and confirm your data input.
Regards