Meet Your Coaches

Our coaching team combines playing experience with TrackMan, Sportsbox AI, SAM PuttLab and hands-on equipment knowledge to help golfers understand what is happening and what to work on next.

Our coaches have also received hands-on training from a former tour professional with more than 30 years of playing and coaching experience.

Golf coaching at Clubhouse Hawaii in Honolulu
Justin Shimomi
PGA ASSOCIATE · FITTING, SWING & PUTTING

Justin Shimomi

Justin brings extensive club-fitting experience and advanced putting-analysis training to golfers who want clear, measurable feedback on equipment and performance.

  • TrackMan University Levels 1 & 2
  • SAM PuttLab Levels 1–3
  • Sportsbox AI Level 2
MoreLess
  • PING Certified
  • AimPoint trained
  • Callaway Certified Master Fitter
  • Mitchell Golf Repair School
  • TaylorMade Fitting Certified
  • United States Golf Teachers Federation Golf Instructor Certification
  • True Temper Certified
  • Fujikura Certified
  • Graphite Design Certified
  • Mitsubishi Fitter Certification
  • Titleist Certified
  • Srixon Certified
  • Club Builder of America Certification
  • Clubfitter of America Certification
  • Mizuno Certified
  • L.A.B. Golf Certified
  • TPT Certified
  • AutoFlex Certified
Colby Gundy Gunderson
PGA ASSOCIATE · SWING & PUTTING

Colby “Gundy” Gunderson

Hawaii-raised competitive golfer and instructor with collegiate playing experience and a practical approach to improving ball striking, movement and putting.

  • SAM PuttLab Level 1
  • TrackMan University Levels 1 & 2
  • Sportsbox AI Level 2
  • PING Certified
  • L.A.B. Golf Certified
  • AimPoint trained
  • Mitchell Golf Repair School
Nickolas Rivera
PGA ASSOCIATE · SWING & PUTTING

Nickolas Rivera

Former Division I collegiate golfer with competitive playing experience and a detailed understanding of ball flight, swing mechanics and putting performance.

  • TrackMan Level 2 Certified
  • SAM PuttLab Level 1
  • Sportsbox AI Level 2 Certified
MoreLess
  • Mitchell Golf Building & Fitting Certified
  • Callaway Master Fitter
  • TaylorMade Fitting Certified
  • United States Golf Teachers Federation Golf Instructor Certification
  • True Temper Certified
  • Fujikura Certified
  • Graphite Design Certified
  • Mitsubishi Fitter Certification
  • PING Certified
  • L.A.B. Golf Certified
  • AimPoint trained
Rachael Wang, Clubhouse Hawaii golf instructor
GOLF INSTRUCTOR · SWING & PUTTING

Rachael Wang

Rachael brings Division I playing experience and training in TrackMan and Sportsbox AI to the Clubhouse Hawaii coaching team.

  • TrackMan University
  • Sportsbox AI Levels 1 & 2
  • Former Division I Golfer

Choose Your Lesson

Swing Coaching TrackMan, Sportsbox AI and video-based coaching for contact, ball flight, consistency and scoring. View Golf Lessons → Putting Coaching SAM PuttLab, PuttStudio, BalanceLab, AimPoint and tempo work for start line, pace and consistency. View Putting Lessons →