Anyone who lives, works, worships, attends school or volunteers in Genesee County, Lapeer County, Livingston County, Macomb County, Oakland County, Saginaw County, Sanilac County, Shiawassee County, Washtenaw County, and Wayne County, Michigan, can become a member of Security Credit Union. Persons who are donors to the Salvation Army of Genesee County, a non-profit corporation, can also become a member of Security. Potential members may also be eligible by having an immediate family member or household member that is currently a member or eligible to be a member.nYou can join today with an initial deposit of $5 in a Share Savings Account. Once you’re a member, you’re always a member, even if you change jobs, retire, or move out of the area.