Coaches

Program Lead: Head Coach Petar Bozhilov

A former NCAA Division I swimmer at SMU, Petar now races internationally on the World Triathlon circuit, competing against the world’s best and consistently exiting the water first or with the lead group.

His background includes over 600 swimming & triathlon medals and 60 Bulgarian national records.

With experience coaching triathletes acro

His background includes over 600 swimming & triathlon medals and 60 Bulgarian national records.

With experience coaching triathletes across Bulgaria and the US, Petar brings elite racing insights to personalized remote coaching.

Through custom training plans and ongoing support, he helps you swim stronger, race smarter, and reach your goals - wherever you train.

pb@kosmostri.com | (469) 879-6749

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Assistant Coach: Alexander Bozhilov

Program Lead: Head Coach Petar Bozhilov

Alex is a world-ranked Bulgarian triathlete and 6-time Elite National Triathlon Champion (2022–2026). In 2026, he secured his 6th consecutive national title, finished 3rd U23 and 6th overall at the World Aquathlon Championships in Pontevedra, and 2nd U23 and 4th overall at the European Aquathlon Championships in Pamplona, Spain.

He also re

He also recently placed 5th at an Americas Triathlon Cup in Lima, Peru.

With over 600 medals across triathlon, aquathlon, swimming, and running, his titles include Vice World Aquathlon Junior Champion, European Triathlon Junior Cup Champion, African Triathlon Junior Champion, and European Aquathlon Junior Champion.

He brings that technical expertise to personalized coaching through Kosmos, helping athletes train stronger and race with confidence.

Entering his senior year at the University of Texas at Dallas (NCAA Division II), Alex also competes in track & field and cross-country.

abozhilov05@gmail.com | (469) 216-5711

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Senior Coach & Advisor: Boris Bozhilov

With 16 years in triathlon, Boris has been a driving force behind Petar and Alex’s development, co-coaching and advising them throughout their progression into elite international racing.

A Bulgarian National Triathlon Team coach in 2023 and 2025 and a registered Head Triathlon Coach with Bulgaria’s Ministry of Sports, Boris was also reco

With 16 years in triathlon, Boris has been a driving force behind Petar and Alex’s development, co-coaching and advising them throughout their progression into elite international racing.

A Bulgarian National Triathlon Team coach in 2023 and 2025 and a registered Head Triathlon Coach with Bulgaria’s Ministry of Sports, Boris was also recognized as Bulgaria’s third-ranked swimming coach in 2017.

At Kosmos, he brings his expertise in technique, training strategy, and long-term athlete development to the coaching team - helping turn elite racing experience into smarter, more effective training for you.

bruno68@abv.bg

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He is old - only Facebook here :D

WHAT MAKES US DIFFERENT?

Customized Around You

Real-World Racing Experience

Personalized coaching tailored to your goals, fitness, and schedule. Your plan evolves weekly based on your performance and feedback, with race preparation, pacing strategies, and training load and recovery management built in.

Real-World Racing Experience

We race internationally every season, competing against the world’s best. From training & equipment to pacing, nutrition, and recovery, we bring firsthand experience directly to your coaching - sharing what we learn and put into practice ourselves.

Always Learning

Real-World Racing Experience

Every Distance. Experience That Counts.

When we’re not racing, we’re watching - studying transitions, tactics, and the decisions that win races. We stay connected with top athletes and keep exploring new developments in training, nutrition, supplements, and equipment to bring fresh insights to your coaching.

Every Distance. Experience That Counts.

Our coaching goes beyond the short-course racing we compete in. We’ve helped athletes prepare for sprint, Olympic, middle- and long-distance triathlons, tailoring training, pacing, and fueling to the demands of your race.

Real Conversations. Every Week.

Every Distance. Experience That Counts.

Real Conversations. Every Week.

We talk with you weekly, review your progress, and adjust your plan based on performance and feedback. Have a question or need to talk something through? We pick up the phone.

Adjustments as We Go

Every Distance. Experience That Counts.

Real Conversations. Every Week.

Fatigue builds, schedules change, and life happens. We use coaching judgment and your feedback to adapt your training, recovery, and race strategy - keeping you moving toward your goals when things don’t go to plan.

What do our athletes say about us!

Stefani Mihaylova

Pete & George Clow

“Petar, Alex, and Boris each bring something different to my training. Their strengths complement each other, and together they’ve helped me keep improving across swimming, cycling, and running. I feel supported by a whole team that understands my goals.”

— Stefi, 5× National Champion

Pete & George Clow

“We came to Petar and Alex as experienced club swimmers, and they helped us go from 5:30 to under 5 minutes in the 500 freestyle. Now they’re guiding us into triathlon, bringing the same personal attention and encouragement to a whole new challenge.”

— Pete & George, Club Swimmers & Emerging Triathletes

Emiliyan Borikov

Pete & George Clow

Emiliyan Borikov

“With Petar, Alex, and Boris, you get three coaches for the price of one - and their strengths really complement each other. They’ve made me even more excited about triathlon, and their training has helped me improve my race times season after season as I work toward the podium.”

— Emiliyan, Age-Group Triathlete Chasing the Podium

Hristian Gochev

Pete & George Clow

Emiliyan Borikov

“I’ve worked with the team for years, both as a coached athlete and a training partner. My focus is on longer distances, and their knowledge reaches well beyond sprint racing. They’ve taught me how to train smarter - knowing when to push and when to recover, instead of going hard every day.”

— Hristian, Ultradistance Runner, Cyclist & Triathlete

Frequently Asked Questions

Please reach us at pb@kosmostri.com if you cannot find an answer to your question.

Do I need to be an experienced triathlete to work with you guys?

Not at all! Whether you’re preparing for your first triathlon or chasing a podium, we build your training around your current fitness, experience, and goals - and guide you every step of the way.

How does online coaching work?

Your personalized training plan is delivered weekly through TrainingPeaks, where you can log workouts and share feedback directly. We review your training, add coaching feedback on the platform, and connect through weekly calls to discuss progress and adjust your plan.

Can I get coaching for just one sport?

Absolutely! We coach swimming, cycling, and running individually or together as a complete triathlon program. We can also offer some guidance on stretching, dryland strength work, and injury-related exercises, following recommendations from your physiotherapist where needed.

What if I get injured or my schedule changes?

Life happens: your training plan should adapt. Let us know, and we’ll adjust your workouts around scheduling conflicts, fatigue, or injury. If you’re injured, we’ll work within your healthcare provider’s guidance to support your return to training.

Why choose you guys over an AI training plan?

We bring the human connection and coaching judgment behind your plan. As three active coaches, we assess your performance, listen to how you’re feeling, and consider the stresses beyond training. Through weekly conversations, personal support, and real racing experience, we help you decide when to push, when to recover, and when to change course.

How do you keep your coaching affordable?

We’ve intentionally kept our rates competitive for the personal attention and expertise you receive. Our pricing reflects our goal: to help more athletes develop while growing our coaching team and keeping athlete-to-coach ratios lean. As we grow, individual attention stays central to our coaching.