Bob,, 

Szymki (Polesie) on the Belarus border was identified as a village within the Zubrzyca gmina (community), Sokółka powiat (district). Within Szymki two large "folwarks" (homesteads) owned by landlords Trzeciak and Aleksandrow were located. Researched by you ancestors were most probably employed in folwarks of those landlords.

I couldn't locate any more data on Szymki, but the nearby Zubrzyca and Sokółka with large Jewish population should have the records.

Best,

Alexander Sharon
Calgary, Alberta