Nadine Riesen Joins West Ham on Free Transfer in Defensive Rebuild Push | OneFootball

Nadine Riesen has completed a move to West Ham United, with the Switzerland international defender joining on a three-year deal after leaving Eintracht Frankfurt.

That matters because West Ham are not just adding depth here; they are bringing in an established international full-back with top-league and European experience at a point when defensive stability has become a clear priority.

What the move actually involves is now clear, and the detail matters beyond the headline

According to WSL Full-Time, West Ham United have signed Riesen on a free transfer following the expiry of her contract with Frauen-Bundesliga side Eintracht Frankfurt. The 26-year-old has signed a three-year contract and becomes the East London club’s fourth signing of the summer, in a window running under the structure already outlined in She Kicks’ guide to the WSL transfer windows for 2026/27.

Riesen arrives with 42 caps and two goals for Switzerland. Her club pathway has taken her through FC St. Gallen, BSC Young Boys and FC Zürich, where she won two league titles and a domestic cup before moving to Frankfurt in 2023.

She made 48 Bundesliga appearances for Eintracht, while also adding UEFA Women’s Champions League experience to her profile. In her first words as a West Ham player, Riesen said she was “super-excited” by the club’s interest and pointed to both Rita Guarino’s ambition and positive conversations with compatriot Seraina Piubel.

What Riesen brings to West Ham

That decision says plenty about how West Ham are trying to build. Riesen is not arriving as a speculative project but as a player with a settled senior international career, experience in Germany’s top division and the adaptability that usually matters in the WSL where full-backs are asked to defend wide spaces, support attacks and survive relentless transition football.

She has largely been viewed as a reliable, energetic full-back who can get up the line and recover well, and that matters for a side that has too often needed greater certainty without the ball. Her tournament pedigree also matters.

At Euro 2022, she scored Switzerland’s opening goal of the finals against Norway, a moment that helped push her profile beyond dependable domestic performer into proven big-stage international.

That fits with the profile of recent market business across the league, where clubs have looked for players who already understand elite environments rather than simply betting on potential.

As seen in She Kicks’ coverage of Caroline Weir’s move to OL Lyonnes and Beth Mead’s move to Manchester City, this summer has been defined by clubs acting decisively on proven talent with international-level habits.

For West Ham, the significance is slightly different. This is less about star power than structure. This is not a sentimental pick. It is a football decision.

WSL clubs continue to recruit from abroad

That fits a wider pattern She Kicks has been tracking in the way WSL clubs are pulling experienced internationals from strong European leagues, particularly in defensive areas. West Ham have leaned into that logic here, adding another capped defender from a major continental club and continuing a recruitment line that suggests the club see their back line as the starting point for improvement rather than the final touch.

There is also a clear Swiss thread to this move. With Seraina Piubel already in the building and Leila Wandeler also arriving this summer, the club are creating a small but notable international cluster that can ease adaptation while also raising the technical floor of the squad.

Fine in principle, but the harder question is whether this recruitment drive will be matched by enough attacking punch and tactical coherence elsewhere. Signing good defenders is smart. Turning that into a team that consistently controls matches is the bigger job.

Will Reisen start for West Ham?

What comes next will show whether Riesen goes straight into Guarino’s strongest back line, whether she is used primarily as a left-back or in a more flexible wide defensive role, and whether West Ham’s goals-against numbers actually improve once the season settles. Those are the concrete markers now.

There will also be interest in how quickly the new defensive unit develops chemistry through pre-season, especially with multiple international arrivals coming from different leagues and tactical backgrounds.

If Riesen brings the consistency she showed in Germany and with Switzerland, this could be one of those signings that looks modest on announcement day and increasingly important by October.