Sales Engineer applicants have rated the interview process at Zscaler with 3.5 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 60% positive. To compare, the company-average is 53.4% positive. This is according to Glassdoor user ratings.
Candidates applying for Sales Engineer roles take an average of 107 days to get hired, when considering 10 user submitted interviews for this role. To compare, the hiring process at Zscaler overall takes an average of 32 days.
Common stages of the interview process at Zscaler as a Sales Engineer according to 10 Glassdoor interviews include:
Phone interview: 21%
One on one interview: 18%
Group panel interview: 13%
Presentation: 13%
Background check: 10%
Skills test: 10%
Drug test: 8%
Personality test: 5%
IQ intelligence test: 3%
Here are the most commonly searched roles for interview reports -
I applied through an employee referral. I interviewed at Zscaler in Aug 2025
Interview
solid interview process with 4 total interviews.
1 screening
2 with hiring manager
3 a technical interview
4 with the team
I only made it to round 2 and didnt get past that
Was a decent interview, did a number of rounds but I was ultimately ghosted. Didn't feel like my performance was the best anyways but nonetheless I showed up, was hoping they'd do the same for me.
Interview questions [1]
Question 1
- Where would I want to focus my learning i.e. certifications ETC,
- am I passionate about cybersecurity
I applied through an employee referral. The process took 2 weeks. I interviewed at Zscaler in Aug 2025
Interview
Interview Process:
Initial recruiter screen
Call with hiring manager
Technical interview with Principal SE
Week of radio silence
Rejection via voicemail citing "not technical enough"
Pros:
The technical interviewer was knowledgeable about the products
Territory seemed to have genuine opportunity
Cons:
Red Flags About Role Transparency: Both the recruiter and hiring manager gave conflicting stories about why the position was open. The hiring manager mentioned an "advanced candidate in process" but promised "fair evaluation" - this should have been my first warning sign. If you already have a preferred candidate, why waste everyone's time?
Poor Communication: After a rushed technical interview, I heard nothing for a full week despite being told they were moving quickly. The recruiter finally left a vague voicemail about not being "technical enough" - no specific feedback or areas for improvement. For a company expecting enterprise-level professionalism, their candidate communication is surprisingly poor.
Questionable Technical Assessment: Despite 15+ years in IT and 10 years in sales engineering with companies like Dell/EMC and recent experience at Sumo Logic (a direct competitor in security/observability), I was deemed "not technical enough." The technical interview covered DNS over HTTPS and HTTP versions but barely touched on actual sales engineering scenarios or customer-facing skills they claimed were critical.
Rushed Yet Slow: The technical interview felt rushed, yet the overall process dragged with poor follow-up. They emphasized their "90-day training program" and "extensive tribal knowledge" requirements, but then rejected candidates for not already knowing their specific product details.
Would not recommend interviewing here unless you're desperate or have inside connections. The lack of transparency and poor communication are likely indicators of larger organizational issues.
Interview questions [1]
Question 1
Explain the differences between TLS 1.2 and 1.3.
What is DNS over HTTPS?
Describe HTTP version differences.