Sienna Bertsch

Personable and motivated, equipped with foundational knowledge and technical skills in project management and data analysis. Possesses familiarity with industry-standard software and tools, including proficiency in Microsoft Office and basic coding languages. Aims to leverage these skills to contribute to team success and drive positive outcomes.

Water Polo Coach at Sunny Hills High School (2025-09 – Present)

Developed and implemented training programs to enhance player performance and teamwork skills while fostering a positive team culture through effective communication and collaborative activities.

• Developed and implemented training programs to enhance player performance and teamwork skills.
• Fostered a positive team culture through effective communication and collaborative activities.
• Organized and led strategy sessions to prepare athletes for competitive matches.
• Coordinated logistics for practices, ensuring optimal use of facilities and equipment resources.

Lifeguard at Fullerton Family YMCA (2024-06 – 2025-08)

Maintained swimmer safety and pool facility standards through vigilant monitoring, emergency response, and water quality management while providing excellent customer service.

• Learned and maintained proficiency in first responder skills such as First Aid, CPR, and administering Emergency Oxygen to offer individuals in distress optimal support.
• Ensured swimmer safety by vigilantly monitoring pool area and enforcing rules.
• Provided friendly customer service to guests and addressed concerns.
• Responded to emergency situations in a timely, efficient manner.
• Conducted routine water tests to maintain proper chemical balance, ensuring optimal swimming conditions for patrons.
• Participated in ongoing professional development opportunities to stay current on best practices in lifeguarding and water safety education.
• Increased patron satisfaction by promptly addressing concerns and providing exceptional customer service at all times.

Swim Instructor at Fullerton Family YMCA (2024-06 – 2025-08)

Taught daily swim instruction to students of varying ages and skill levels while maintaining certifications and promoting a fun, engaging learning environment.

• Taught daily swim instruction to students varying in ages and skill levels.
• Maintained CPR, First Aid, and lifeguard certifications to ensure preparedness for emergency situations during lessons.
• Promoted a fun learning environment through engaging activities and games designed to reinforce essential swimming skills.
• Improved swimmer confidence by providing consistent positive reinforcement and constructive feedback on technique.

Dog Walker & Dog Sitter at Wag! Dog Walking (2025-01 – Present)

Provided comprehensive pet care services including walking, sitting, feeding, grooming, and regular communication with clients about their pets' wellbeing.

• Supported clients during extended travel by providing consistent updates, photos, and videos of their pets' activities and wellbeing.
• Maintained a safe and secure space for dogs by adhering to strict house rules and guidelines set by the pet owners.
• Ensured timely feeding, walking, and grooming routines for each dog under my care, resulting in contented and well-cared-for pets.

Bachelor of Science in Off Campus Data Science Major at Claremont Mckenna – Pitzer College (2028-05)

Bachelor of Science in Computer Science – California State University, Fullerton

High School Diploma – Sunny Hills High School (2024-05)