hey there!

I’M SINA SIAR 

Pronounced (Sea-NA Sa-Yer)

Sina is a certified Thermalist, Embodiment Coach, and the founder of Contrast—a boutique wellness practice in San Francisco offering guided sauna and cold plunge rituals for modern mental wellness seekers. With over a decade of experience architecting enterprise security systems for Fortune 100 companies, Sina now channels his precision and insight into a different kind of firewall: the one between our overstimulated minds and our neglected bodies.

Raised in Los Angeles and shaped by both Silicon Valley intensity and the intimacy of healing arts, Sina’s work lives at the intersection of resilience and reverence. He holds a degree in Computer Science from UCLA and has held senior roles at companies like Fastly and Cisco. But it was his personal reckoning—diagnosed with Crohn’s Disease in 2012 and disillusioned by conventional medicine—that led him to the profound intelligence of breath, heat, cold, and presence.

What began as a self-healing journey became a life mission. Sina has since lost over 100 pounds, quit smoking, released old coping patterns, and opened a new chapter rooted in vitality and stillness. He is trained in Hatha Yoga, Buddhist psychology, somatic attachment work, breathwork, and trauma-informed facilitation. His teachings are integrative, science-backed, and deeply embodied—designed not just to optimize performance, but to awaken awe.

In the bathhouse, Sina weaves together mindfulness, breath, heat, and cold to create immersive journeys that quiet the mind and reawaken the body's knowing. Each session is an invitation to meet yourself at the edge—and soften. His clients range from biohackers to burned-out professionals, festival-goers to first-time seekers—anyone ready to trade numbness for aliveness, and effort for presence.

When he’s not guiding sessions at Contrast, Sina is likely mountain biking through the sculpted landscapes of the Bay Area, refining his running form stride by stride, or braving the Pacific’s open waters to beat his own Escape from Alcatraz swim record. And when the sun goes down, you might find him dancing to deep underground house music—moving not to perform, but to feel. To him, self-care isn’t a spa day—it’s a spiritual discipline. And in a fractured world, gathering in intentional space isn’t a luxury—it’s a lifeline.

EDUCATION

Certified Thermalist Training with Dr. Susana Soberg

2024

Spiritual Mentorship with Dr. Ali Maya

on-going

Practicing Vipassana Meditation with S. N. Goenka

on-going

Spiritual Mentorship and Ashtanga Yoga Training with Mojdeh Zahir

on-going

Somatic Attachment Coaching with Mark Tanaka

on-going

Training Reiki Level 1, 2, Craniosacral Therapy With Dr. Eric Ruben

on-going

Certified 500 hour Anusara Yoga Teacher Training with Daniella Cotreau

2015

Certified 200 hour Kundalini Yoga Teacher Training at San Francisco Kundalini Center

2014

Hatha Yoga Training with Mark Whitwell from Heart of Yoga

2015

B.S. Computer Science and Engineering at University of California Los Angeles (UCLA)

2008

Testimonials

  • Amir B.

    I went to the Balance event at Alchemy Springs without any prior experience with Contrast Therapy, though I was familiar with cold-water swimming here in SF Bay Area and hot saunas. This session truly surprised me – I felt so tuned into my body, and I noticed how positively it impacted my mood, sleep, and focus the next day. It’s a unique experience, one that really allows you to explore and understand your physical responses to stress in a powerful way. The most impactful part for me was discovering my body’s reaction to stress and learning to manage it by listening closely and working with my breath. Sina and Nahal’s guidance was invaluable; they clearly explained each step, making it easy to stay present and aware of what my body was experiencing. I’d recommend Balance to anyone curious about pushing their limits in a supportive environment – it’s a new experience that helps you face discomfort while equipping you with techniques to navigate it.

  • Patima P.

    I never thought I’d be the type of person who could enjoy a cold plunge — but I surprised myself. Sina and Nahal’s Contrast Therapy experience helped me move through discomfort with presence and calm. I left feeling less stressed, clearer minded, and carrying a deeper sense of trust in myself. Their guided breath work created a safe space to explore both the edges and the stillness within. Thank you! ✨🫶🏼

  • Laura C.

    Wow… I cannot say enough about this experience, and the facilitators. This experience is an intense, efficient workout for both the mind and the body in a way that I haven’t found anywhere else. I’ve been a fan of sauna and cold plunges for the health benefits, but combining in with meditation guided by these two grounded and attuned individuals creates an incredible wellness offering that had a notable impact on my mood after one session, and I believe would profoundly benefit mental resilience and health if performed with some regularity. Wow. Thank you Sina and Nahal for bringing this to the world. I look forward to being back!

  • Ariane S.

    I work in Tech and I’m always so much in my head - meetings, calls, action items… It’s a constant stream of “must do’s” or “cannot forget’s”. Coming to Contrast always helps me to get into my body like nothing else. I arrive discombobulated and without any body awareness at all, and leave feeling calm, collected, and fully aware of what my body needs. It has turned into my self care and healing routine and I love it. Sina is an expert at guiding the group via breathwork and meditation through hot and cold - with equanimity.