Question 1

Do you need a license to work in cybersecurity?

Accepted Answer

No. There is no government license for cybersecurity engineering. Competence is demonstrated through certifications (CompTIA, ISC2, ISACA, GIAC, OffSec, ISA) and hands-on experience. Some government and defense roles contractually require specific certifications, but they are credentials, not licenses.

Question 2

What is the best entry-level cybersecurity certification?

Accepted Answer

CompTIA Security+ is the most widely recognized entry point — vendor-neutral, broad, and accepted across industry and government (it meets US DoD 8570/8140 baseline requirements). From there, analysts add CySA+, offensive specialists add PenTest+, and OT professionals build toward GICSP.

Question 3

Which certification is best for OT / ICS security?

Accepted Answer

The two leading OT credentials are the GICSP (Global Industrial Cyber Security Professional) from GIAC/SANS, which bridges IT, OT, and engineering, and the ISA/IEC 62443 cybersecurity certificates, which are built directly on the OT-security standard. Most OT security professionals hold an IT foundation (like Security+) plus one of these.

Question 4

Is CISSP worth it, and how hard is it?

Accepted Answer

CISSP is the benchmark senior security certification and is highly valued for architecture and leadership roles. It is challenging — it requires five years of experience across two or more of its eight domains and a broad, management-oriented exam. Many treat it as a mid-career milestone rather than an entry cert.

Question 5

Are cybersecurity exams open or closed book?

Accepted Answer

It varies by body. CompTIA, ISC2, and ISACA exams are closed-book proctored exams. GIAC exams (GSEC, GICSP) are notably open-book — you bring your own indexed notes. OSCP is a fully hands-on 24-hour practical exam where you exploit real machines.

ISA/IEC 62443 Cybersecurity Fundamentals