You need to apply formatting to the datetime field.
Try this:
var query3 = from p in _zentity.Tbl_Employer_History
join r in _zentity.Tbl_Industry
on p.industry_id equals r.industry_id
where p.member_id == memberId
select new
{
p.employer_name, p.industry_id, p.designation,
p.worked_from.ToString("dd-MM-yyyy"),
p.worked_to.ToString("dd-MM-yyyy"),p.responsibilities
};
gvw.DataSource = query3;
gvw.DataBind();
--Amit