Spotlight: Petro Perselis @ HackTheBox
Today we're spotlighting ๐Petros Perselis๐, a seasoned CS leader!
How did you get into customer success?
I started my career in investment banking, specifically advising customers on potential M&A deals. I enjoyed the analytical parts of the job as well as the client interactions. In 2014, when I was given an opportunity through my grad school alumni network to join a growing SaaS scaleup in a new software category (customer and employee experience), I took it. I joined Medallia as the 20th employee in Europe and one of the early hires in the Professional Services team. Since then Iโve been a Professional Services / Client Solutions / Customer Success professional as well as a leader in scaleups and startups, and I have been through 2 IPOs and acquisitions. In Customer Success you need a similar variety of customer facing skills, analytical thinking, problem solving abilities as you need in banking. As a leader, you also need empathy, team management skills as well as strategic thinking to set the vision and manage the P&L of your department. No day is the same and this is what keeps it fun!

Are there any customer success trends in 2025 you are keeping an eye on?
Definitely. The past 2-5 years weโve seen Customer Success shift from reactive support to strategic enablement. In 2025, Customer Success is about being indispensable, not just a partner, but a force multiplier for growth and resilience. A few trends Iโm keeping an eye on are:
- ๐ข๐๐๐ฐ๐ผ๐บ๐ฒ-๐๐ฎ๐๐ฒ๐ฑ ๐ฆ๐๐ฐ๐ฐ๐ฒ๐๐ ๐ข๐๐ฒ๐ฟ ๐๐ฐ๐๐ถ๐๐ถ๐๐-๐๐ฎ๐๐ฒ๐ฑ ๐๐ป๐ด๐ฎ๐ด๐ฒ๐บ๐ฒ๐ป๐: Itโs not about frequency of engagement, but measurable impact. Itโs about aligning customer journeys with business outcomes.
- ๐๐ฆ ๐ฎ๐ ๐ฎ ๐๐ฟ๐ผ๐๐๐ต ๐๐ฟ๐ถ๐๐ฒ๐ฟ: CS is now central to expansion, adoption, and long-term value. The CCO is the best friend of the CFO, which is exciting but also adds an additional layer of accountability.
- ๐ฃ๐ฟ๐ผ๐ฎ๐ฐ๐๐ถ๐๐ฒ, ๐๐-๐๐ฟ๐ถ๐๐ฒ๐ป ๐๐๐๐๐ผ๐บ๐ฒ๐ฟ ๐๐ฒ๐ฎ๐น๐๐ต ๐ ๐ผ๐ป๐ถ๐๐ผ๐ฟ๐ถ๐ป๐ด ๐ฎ๐ป๐ฑ ๐ฐ๐ต๐๐ฟ๐ป ๐ฝ๐ฟ๐ฒ๐๐ฒ๐ป๐๐ถ๐ผ๐ป.
What's the most rewarding part of your role in customer success?
One of the best parts is being seen as a ๐๐ฟ๐๐๐๐ฒ๐ฑ ๐ฎ๐ฑ๐๐ถ๐๐ผ๐ฟ to our customers. I love getting to learn from them, their passion, their missions, and how theyโre applying what we offer in such creative ways. It keeps me inspired.
I also really enjoy working with ๐ผ๐๐ฟ ๐๐ฆ๐ ๐ ๐๐ผ ๐ฏ๐ฟ๐ฎ๐ถ๐ป๐๐๐ผ๐ฟ๐บ ๐ป๐ฒ๐ ๐ถ๐ฑ๐ฒ๐ฎ๐, whether itโs improving onboarding, building smarter playbooks, or finding small ways to wow our customers. The creativity in this role is underrated.
Another thing I appreciate is that ๐๐๐๐๐ผ๐บ๐ฒ๐ฟ ๐ฆ๐๐ฐ๐ฐ๐ฒ๐๐ ๐ธ๐ฒ๐ฒ๐ฝ๐ ๐ฒ๐๐ผ๐น๐๐ถ๐ป๐ด. Thereโs always a new initiative, a new process to improve, or a strategy to test. It keeps the work fresh and dynamic.
And letโs be real, ๐๐ถ๐ป๐ป๐ถ๐ป๐ด ๐ฎ ๐ฟ๐ฒ๐ป๐ฒ๐๐ฎ๐น ๐ผ๐ฟ ๐ฎ๐ป ๐ฒ๐ ๐ฝ๐ฎ๐ป๐๐ถ๐ผ๐ป feels amazing. It means what weโre doing is working and our work drives revenue - thatโs the best kind of motivation.
How do you foster a strong culture within your success teams?
Iโve tried a few things over the years.
The most important is knowledge sharing - I ask CSMs to share stories / concerns / product feature ideas often in our Slack channels or during team meetings, and get input from other team members. No question is unimportant or embarrassing, and no idea is better than the next one.
I give public kudos for great work and outcomes even if itโs for a โsmallโ achievement.
I try to bring my teams together for in-person business breakouts / workshops, as well as social time, e.g. either during the Revenue Kick Off or a department-specific offsite (e.g. QBR). Bowling, laser tag, lunch, escape rooms, go-carting are all great team and culture building activities. Developing personal relationships is the most important aspect of a strong team culture.
Finally, I encourage full transparency and I lead by example on this front. I host frequent 1on1s with my extended teams, I am always available on Slack, and I share big initiatives even when theyโre not fully baked, explaining the โwhyโ behind the initiative or the thought process.