42 Engineering services in the field of electromagnetic interference (EMI), electromagnetic pulse (EMP), and radio frequency interference (RFI) shielding; testing and analytical services to evaluate the efficacy of EMI, EMP, and RFI shielding for civilian and military structures, facilities, buildings, and equipment; engineering services, namely, high-altitude electromagnetic pulse (HEMP) acceptance and verification test and evaluation services on command, control, communications, computers, and intelligence (C4I) facilities in military environments; design of fixed, transportable, and mobile shielded structures to protect electronic systems and equipment from electromagnetic interference (EMI), electromagnetic pulses (EMP), and radio frequency interference (RFI); design of hardness-critical assemblies, namely, waveguides, bypass panels, doors and hatches, radio frequency filters and filter enclosures, and similar components of shielded structures; inspection of EMI, EMP, and RFI shielding for civilian structures, facilities, buildings, and equipment; inspection of EMI, EMP, and RFI shielding for command, control, communications, computers, and intelligence (C4I) facilities in military environments; inspection of civilian and military structures, facilities, and buildings via industrial rope access