Our Team

The coaches make the gym.

Every session at Gymnasium is led by a qualified coach. Most of our team have been on the floor for a decade or more. Strength & conditioning specialists, Olympic lifting coaches, gymnastics coaches, ex-athletes. The reason the coaching is good is because the coaches are.

Coaches

Coaches at every gym.

Each site is run by a Gym Lead with their own team behind them. Same coaching standard across every location.

Brixton

SW9 View location →
Gym Lead, Brixton

Nic

Born in Johannesburg. Played professional rugby, plus district-level water polo and bouldering. Moved to Cape Town and started coaching there.

8+ years training private clients, celebrity clients with film-specific goals, and mixed-level group classes. Passionate about functional fitness, the combination of strength & mobility, and the role training plays in mental health.

CrossFit L1 & L2
Assistant Gym Lead, Brixton

Ang

Trained by world-class CrossFit coaches including Level 4 and seminar staff while falling in love with the sport. L1 in 2021, L2 in 2023, currently studying for L3, which puts her in the top 1% of CrossFit coaches worldwide.

Helps members move better within their current capacity. Off the floor: training with members or out walking Tia. (Yes, the dog is named after the fittest woman on earth.)

CrossFit L1 & L2

Kennington

SE17 View location →
Gym Lead, Kennington

Sósie

National-level hockey player at Loughborough. BSc Sport, Exercise & Health Sciences. Originally from the Isle of Man.

Started in sports events, qualified as a Level 3 PT during the pandemic, and joined Gymnasium when Wandsworth opened in April 2021. If you haven't met Sós as a coach yet, you've definitely seen her sweating it out in a class.

BSc Sport, Exercise & Health Sciences · CrossFit L2 · Hyrox World Championships · 2025 CrossFit Games Semifinals
Coach, Kennington

James "Hamsher"

Winner of Gymnasium's Attention to Detail Award every year, because standards matter. Lines straight, plates re-racked, movement crisp.

Born and bred South Londoner, proud dad, serial encourager. Has coached boutique, studio, globo, and everything in between. Gymnasium has always felt like home. The guy who'll quietly change your life by fixing your setup, not your soul.

CrossFit L2 · Level 3 Personal Trainer

Wandsworth

SW18 View location →
Gym Lead, Wandsworth

James

Coaching for 18+ years. BSc Strength & Conditioning Science from St Mary's. Elite-level coaching experience with top student athletes across rugby league, football, netball, hockey and rugby union.

Played rugby and hockey to county standard, semi-pro football. Specific passion: Olympic lifting and running mechanics.

BSc Strength & Conditioning Science · Level 3 Personal Trainer · Level 2 Sports Coaching, Kettlebell & Gym Instructor · CrossFit L1 · Studio Cycling, Circuit Training, Sports Nutrition, Boxing
Assistant Gym Lead, Wandsworth

We're hiring

Looking for a coach ready to step into a leadership track. CrossFit L1+ and 2+ years of coaching experience. Apply through our hiring portal.

Apply to coach →

Ealing

W5 View location →
Gym Lead, Ealing

Aaron

Born in Johannesburg, moved to Durban after school to study sports science at the Sharks Rugby Academy. Played rugby and worked as S&C coach for his local club.

Moved to Scotland for rugby, then to London. Coach and Assistant Gym Lead at Wandsworth before taking the lead at Ealing. Gives 100% to his members. He'll get the best out of you, and you'll have a good time doing it. Guaranteed.

CrossFit L1 & L2 · Diploma in Sports Specific Training · Level 3 Personal Trainer
Coach, Ealing

Becca

Left a corporate Account Manager role 6 years ago to retrain as a Level 3 PT. Hasn't looked back. Before CrossFit she was a fully committed runner: 4 marathons, more half marathons than she can count, and still favours a cardio WOD.

Outside the gym: dog mum to two mini Aussie Shepherds, wife to Tom, owner of way too many pairs of trainers (all RADs).

CrossFit L1 & L2 · Level 3 Personal Trainer

Twickenham

TW1 View location →
Gym Lead, Twickenham

Tom

Degree in Exercise & Sports Science (1st Class). Played semi-professional rugby for 10+ years. Our in-house TRX Specialist.

Glass-half-full energy that'll put a smile on your face whichever Gymnasium you find him at.

BSc Exercise & Sports Science (1st Class Hons) · REPS Level 3 Personal Trainer · TRX Certified Trainer · CrossFit L1
Coach, Twickenham

Graeme "G"

Family man. Husband to Roseana, dad to Malachi.

Off the floor: church (with Roseana), all sports (especially Arsenal, plus telling British people how good South African rugby is), and coffee. Only bring him a flat white from Bones.

CrossFit L1 & L2 · CrossFit Gymnastics
Leadership

The people running Gymnasium.

A small leadership team that's still on the floor every week.

Commercial Director

Alex

Joined Gymnasium as a member in 2015. Started part-time coaching, then left consulting in 2018 to come on full-time. Has vowed never to wear a suit to work again.

Now runs strategy, processes & finance. Swimming, water polo & rugby background.

CrossFit Level 2 Coach
Sales Director

Jack

Former national league basketball player. Opened IN2CROSSFIT Clapham in 2014, which became Gymnasium in 2018. Driving force behind UK CrossFit competition The Athlete Games.

Loves taking people who don't think they're remotely fit and showing them what they're actually capable of.

BSc Sport & Sport Psychology · CrossFit L1, Kids, Mobility, Football, Westside · BWLA L1 Olympic Lifting · Level 3 PT · Kettlebell · Bulgarian Bag
Member & Team Support

Karen

25 years in corporate project management before joining Gymnasium in 2017, full-time from 2020. Owns member services, business support & HR.

Red bar of shame? Can't book a class? Want to change your membership? Karen is the one to call. Former Nationals-level swimmer & Western Counties champion. Owner of twin teenage girls, well-equipped for anything the team can throw at her.

CEO

Giles

Co-founded Gymnasium in 2016. 20 years in advertising before that, the last decade as CMO at what3words, taking it from concept to a £350m brand.

International swimming, water polo, softball & rugby growing up. Now wing foils, kite surfs & heli snowboards for the adrenaline rush.

Why it matters

The whole product is the coaching.

The equipment, the room, the programming all matter. But the reason members get fitter, stay consistent, and don't get injured is because someone is watching. Every session, every rep.

If you've trained somewhere where the coach scrolls their phone in the corner, you'll notice the difference within five minutes.

Careers

Coach with us.

We're always interested in great coaches. Strength & conditioning, Olympic lifting, gymnastics, mobility specialists. Apply through our hiring portal: CV plus a few lines on how you coach.

Train with our team.

Book an intro at your nearest gym. Meet a coach, see the space, ask anything.

Get started