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Portrait of Sarah Keller

Sarah Keller


CMS von Erlach Partners Ltd
Dreikönigstrasse 7
P.O. Box
8022 Zurich
Languages German, English, French

Sarah Keller focuses on advising and supporting national and international Clients regarding employment law as well as corporate and general contract and commercial law.

In 2013, Sarah Keller graduated from the University of St. Gallen in Law (M.A. HSG in Law). Before her legal studies, she gained a Masters in Accounting and Finance (M.A. HSG in Accounting and Finance) and worked with a major Audit firm. Following her studies, Sarah Keller joined CMS as a junior associate and subsequently worked as clerk at the district court in Baden.

After her admission to the bar, Sarah Keller rejoined CMS in 2017 as associate.

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CMS is known for its 'immediate', 'practical and reliable' service level in employment matters, ranging from day-to-day operational and policy queries to transactional and dispute resolution handling.

The Legal 500, Employment, Switzerland, 2020

CMS service is unique because we get immediate service. The advice given is practical and reliable.

The Legal 500, Employment, Switzerland, 2020

The quick reaction on requests and the professional and competent handling of it. The advice is very practical and understandable.

The Legal 500, Employment, Switzerland, 2020


  • Ist Ihr Arbeitsvertrag noch aktuell?, Zürcher Wirtschaft 08/2019
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  • 2017 Bar admission
  • 2013 M.A. HSG in Law, University of St. Gallen
  • 2012 M.A. HSG in Accounting and Finance, University St. Gallen
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CMS ad­vised Nano Di­men­sion Ltd. on the ac­quis­i­tion of ES­SEMTEC AG
Zurich, Novem­ber 2021 – A team of CMS Switzer­land and Ger­many led by Stefan Brunnsch­weiler ac­ted as Swiss leg­al coun­sel for the lis­ted com­pany Nano Di­men­sion Ltd. (NAS­DAQ: NNDM), an in­dustry lead­er in Ad­dit­ively Man­u­fac­tured Elec­tron­ics (AME) / 3D-Prin­ted Elec­tron­ics (PE), and Mi­cro Ad­dit­ive Man­u­fac­tur­ing (Mi­cro-AM), on all leg­al as­pects re­gard­ing the ac­quis­i­tion of all shares in ES­SEMTEC AG, a swiss stock cor­por­a­tion based in Aesch (Lu­cerne), Switzer­land. Sul­li­van & Worcester Tel Aviv ac­ted as Is­raeli coun­sel for Nano Di­men­sion Ltd.ES­SEMTEC's product port­fo­lio is com­prised of pro­duc­tion equip­ment for pla­cing and as­sem­bling elec­tron­ic com­pon­ents on prin­ted cir­cuit boards (PCBs). They are a lead­er in ad­apt­ive highly flex­ible sur­face mount tech­no­logy (SMT) pick-and-place equip­ment, soph­ist­ic­ated dis­penser suit­able for both high-speed and mi­cro-dis­pens­ing, and in­tel­li­gent pro­duc­tion ma­ter­i­al stor­age and lo­gist­ic sys­tem. Its products are equipped with a soph­ist­ic­ated soft­ware pack­age which makes ex­tens­ive and ef­fi­cient ma­ter­i­al man­age­ment pos­sible. CMS Switzer­land­Stefan Brunnsch­weiler, Man­aging Part­ner, Glob­al Co-Head of the Cor­por­ate/M&A GroupAndrea Relly, Seni­or As­so­ci­ate, Cor­por­ate/M&AM­ark Ca­gi­enard, Part­ner, TaxTho­mas Zweifel, Seni­or As­so­ci­ate, Real Es­tateDr Dirk Spacek, Part­ner, IP/ITAline Stef­fen, As­so­ci­ate, IP/IT­Sarah Keller, As­so­ci­ate, Em­ploy­mentCMS Ger­manyHendrik Hirsch, Part­ner, Cor­por­ate/M&AB­er­rit Roth-Min­gram, Seni­or As­so­ci­ate, Cor­por­ate/M&ATho­mas Ger­del, Part­ner, TaxDr Mar­tin Fried­berg, Coun­sel, Tax
CMS ad­vises Spear­head on in­vest­ment by DEKRA
In the course of a fin­an­cing round of Spear­head AG, in­ter­na­tion­al ex­pert or­gan­iz­a­tion DEKRA has in­ves­ted in the com­pany. Spear­head serves in­sur­ance com­pan­ies, vehicle fleets, and fleet op­er­at­ors with sys­tems for 100% di­git­al pro­cessing of vehicle dam­ages. Spear­head’s busi­ness mod­el fo­cuses on di­git­al pro­cesses for claims set­tle­ment, from the dam­age re­port to fi­nal claim reg­u­la­tion. A crit­ic­al com­pon­ent is a telemat­ics solu­tion, which 100% auto­mat­ic­ally cre­ates a first no­ti­fic­a­tion of loss by Spear­head after an ac­ci­dent and makes it avail­able to cus­tom­ers.DEKRA has been act­ive in the field of safety for al­most 100 years. Foun­ded in 1925 in Ber­lin as Deutscher Kraft­fahrzeug-Über­wachungs-Ver­ein e.V., it is today one of the world’s lead­ing ex­pert or­gan­iz­a­tions. DEKRA SE is a sub­si­di­ary of DEKRA e.V. and man­ages the Group’s op­er­at­ing busi­ness. In 2020, DEKRA gen­er­ated turnover totalling al­most EUR 3.2 bil­lion. The com­pany cur­rently em­ploys around 44,000 people in ap­prox­im­ately 60 coun­tries on all con­tin­ents. With qual­i­fied and in­de­pend­ent ex­pert ser­vices, they work for safety on the road, at work and at home. These ser­vices range from vehicle in­spec­tion and ex­pert ap­prais­als to claims ser­vices, in­dus­tri­al and build­ing in­spec­tions, safety con­sultancy, test­ing and cer­ti­fic­a­tion of products and sys­tems, as well as train­ing courses and tem­por­ary work. The vis­ion for the com­pany’s 100th birth­day in 2025 is that DEKRA will be the glob­al part­ner for a safe, se­cure, and sus­tain­able world. With a plat­in­um rat­ing from Eco­Vadis, DEKRA is now in the top one per­cent of sus­tain­able busi­nesses ranked.A team of CMS led by part­ner Dr Daniel Jenny and as­so­ci­ate Flori­an Jung ad­vised Spear­head on all leg­al mat­ters of the in­vest­ment round.CMS Switzer­land­Dr Daniel Jenny, Part­ner, Cor­por­ate / M&AFlori­an Jung, As­so­ci­ate, Cor­por­ate / M&AAndrea Relly, As­so­ci­ate, Cor­por­ate / M&AChris­ti­an Gers­bach, Part­ner, Em­ploy­ment­Sarah Keller, As­so­ci­ate, Em­ploy­ment­Si­mone Brauch­bar Birkhäuser, Coun­sel, IP­Mark Ca­gi­enard, Part­ner, Tax
The new world of work in Switzer­land
Like in many oth­er coun­tries, the COV­ID-19 pan­dem­ic has promp­ted com­pan­ies in Switzer­land to al­low em­ploy­ees to work from home and, ac­cord­ing to Sarah Keller, an em­ploy­ment law­yer and Seni­or As­so­ci­ate with CMS Switzer­land, "it is very likely that this situ­ation will con­tin­ue after the pan­dem­ic is over", thus pos­ing risks as well as of­fer­ing ad­vant­ages that need to be as­sessed from an em­ploy­ment law per­spect­ive.To as­sess these risks, Swiss em­ploy­ers need to un­der­stand the leg­al basis and im­plic­a­tions of home of­fice and mo­bile work­ing. While some coun­tries in Europe leg­ally reg­u­late vari­ous forms of re­mote work (e.g. tele­work­ing or mo­bile work­ing, re­mote work, etc.), this is not the case in Switzer­land, as em­ploy­ment law­yer and CMS Part­ner Chris­ti­an Gers­bach and Sarah Keller ex­plain. Read the art­icle, listen to the pod­cast and watch we­bin­ar re­cord­ing on this top­ic be­low.
The Fu­ture is Now: The New World of Work in Switzer­land
Em­ploy­ment and the pan­dem­ic Like in many oth­er coun­tries, the COV­ID-19 pan­dem­ic has promp­ted com­pan­ies in Switzer­land to al­low em­ploy­ees to work from home and, ac­cord­ing to Sarah Keller, an em­ploy­ment...
The In­ter­na­tion­al Hotel Law Re­view | 1st Edi­tion
Pre­face The hotel sec­tor has evolved. A lot.It is now a far cry from the coach­ing inn and the 'Mom and Pop' motel, and those who wish to own a hotel no longer have to be in­volved in its op­er­a­tion. There...
CMS ad­vises on the ac­quis­i­tion of the drive and pro­cess tech­no­logy unit...
Zurich, 18 Decem­ber 2020 | Valeta AG, headquartered in Zug, a port­fo­lio com­pany of Frank­furt-based fin­an­cial in­vestor Halder, ac­quires through its sub­si­di­ary Uni­prod AG by way of an as­set deal the drive...
CMS ad­vises Ever­bridge on the ac­quis­i­tion of Tech­wan SA
Ever­bridge has ac­quired all of the is­sued shares in Tech­wan SA. The base con­sid­er­a­tion was paid in part in cash and in part in newly is­sued shares of com­mon stock in Ever­bridge, Inc. With the ac­quis­i­tion...
CMS ad­vises Avec­tris on the ac­quis­i­tion of Lo­gi­care AG
Avec­tris, a Baden-based full-ser­vice IT pro­vider for Swiss mid-mar­ket com­pan­ies, fur­ther ex­pands its port­fo­lio in the health­care sec­tor and ac­quires Lo­gi­care AG.Lo­gi­care, which was foun­ded by hos­pit­als...
In­tern­al in­vest­ig­a­tions on the rise in Switzer­land
What you need to know about best prac­tices and how to pro­tect your com­pany from li­ab­il­ity Whis­tleblower series: Switzer­land A com­bin­a­tion of laws and cor­por­ate best prac­tices have cre­ated a sys­tem...
CMS ad­vises capiton/Cym­biQ on the ac­quis­i­tion of As­pec­tra AG
Cym­biQ Group AG, a port­fo­lio com­pany of Ger­many private equity in­vestor capiton, has ac­quired As­pec­tra AG, Zurich.As­pec­tra AG spe­cial­ises on man­aged host­ing ser­vices for crit­ic­al ap­plic­a­tions and of­fers...
CMS ad­vised Har­ald Quandt In­dus­trieb­eteili­gun­gen GmbH
CMS ad­vised Har­ald Quandt In­dus­trieb­eteili­gun­gen GmbH on the ac­quis­i­tion of a ma­jor­ity stake in mu­seum soft­ware com­pany zetcom An in­ter­na­tion­al team of CMS Switzer­land, Ger­many, France and Spain as well...
CMS ad­vises Halder on the ac­quis­i­tion of Sirag, Univer and Uni­prod
CMS ad­vises Halder on the ac­quis­i­tion of Sirag, Univer and Uni­prod Frank­furt-based fin­an­cial in­vestor Halder ac­quires a ma­jor­ity stake in Swiss-based Sirag AG, Univer AG and Uni­prod AG through its Valeta...