Exhibit 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER

PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Edward J. Sitar, certify that:

1. I have reviewed this Amendment No. 1 on Form 10-K/A of Cancer Genetics, Inc. (the “Registrant”); and

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.

Date: April 28, 2016						/s/ Edward J. Sitar
						Edward J. Sitar
						Chief Financial Officer (Principal Financial Officer)