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The COSLINE sisters
COSLINE sister Martina Sauer

customer service, administration, human resources

Martina Sauer

Tina is responsible for customer service at COSLINE. It matters a great deal to her to be able to offer you dependable customer service. She also coordinates order processing, so that your delivery reaches you as quickly as possible. On top of that she looks after all administration and HR.

Living with atopic dermatitis herself, she knows how hard it is to find good and, above all, well-tolerated cosmetics. So she is ideally placed to advise women with skin problems and to speak from her own experience.

Powerhouse Tina loves taking long walks in the woods with her Labrador. Her two sons also keep her very much on her toes.

Tina's favourite product: Lipliner Nature 206

COSLINE sister Sabine Horner

online marketing, sales, make-up artist

SABINE HORNER

Sabine is the creative mind behind COSLINE. She is responsible not only for the products and product development but also for marketing. This mainly includes presence on social media such as Facebook, Instagram, and YouTube. Sabine loves applying makeup and was seen for many years as a Foundation artist at trade fairs, events, and makeup workshops (before Corona).

With Sabine’s positive energy and enthusiasm, she quickly inspires those around her. Sabine has two children, stays fit in the evenings with Pilates and Jazz Dance, and follows a vegetarian diet. After a long day, she loves to eat chocolate the most.

Sabine’s favorite product: Eyeliner Lila 110

COSLINE sister Lisa Hansen

web optimization, controlling

LISA HANSEN

Lisa keeps the COSLINE website up to date. She makes sure you can find your way around our online shop quickly and order easily. Lisa is also responsible for controlling, because she's very fond of numbers and statistics.

Lisa likes to do a lot of sport, volleyball and jogging for example, as far as her two small children allow. At the weekend she throws herself into her own vegetable garden and enjoys cooking vegetarian food.

Lisa's favourite product: Concealer flüssig 919

COSLINE Nathalie Siegl

customer service, accounting

NATHALIE SIEGL

Nathalie is responsible for customer service and administration at COSLINE. When you call our office or send us a message, Nathalie usually answers all your questions.

Besides that, she is also in charge of handling returns and complaints, as well as dunning and various accounting tasks.

In her free time, Nathalie enjoys keeping up with the latest foundation and beauty trends as well as fashion. She also loves to travel. Her favorite trips are road trips through foreign countries far away from mass tourism.

Nathalie’s favorite product: Cleansing Foam

customer service

Anna-Lena Herr

Anna-Lena is responsible for customer service at COSLINE together with Nathalie and Caroline. If you call us or send us an email, Anna-Lena will take care of your request. Additionally, she supports her colleagues with returns and complaints as well as community management.

Anna-Lena loves to travel passionately. Whether a beach vacation or a city trip, her favorite travel destination is Croatia. In her free time, she enjoys relaxing by cooking, having coffee with friends, or working out with a hula hoop.

Anna-Lena's favorite product: Eyeshadow Champagner 305

COSLINE Caroline Feser

customer service

Caroline Feser

Caroline is part of the customer service team at COSLINE, working alongside Nathalie and Anna-Lena. Whether it's by email, phone, or chat – Caroline answers your questions and ensures everything runs smoothly. She also supports her colleagues with customer management and processing returns.

In her free time, Caroline loves spending time with her family. She especially enjoys going for walks in the fresh air or exploring new places in her local area.

Caroline's favorite product: CosCare Cream 

COSLINE Sabine M

customer service

Sabine Maier

Sabine supports the customer service team at COSLINE and works together with Nathalie, Caro, and Anna-Lena to handle customer inquiries via phone, email, and chat. She is also involved in customer management and helps organize and process returns.

In her free time, Sabine loves to travel and enjoys discovering new cultures and exciting places. She stays active with CrossFit, enjoys cooking, and cherishes time spent with family and friends. She also finds great joy in learning new things and experiencing variety in everyday life.

Sabine's favorite product: Firming Make-Up

COSLINE Leonie

online marketing

Leonie Luz

Leonie is part of the online marketing team at COSLINE and takes care of graphic design. Her tasks include brainstorming ideas for campaigns and promotions as well as their implementation. She is responsible for visualization and content creation for our social media channels. This also includes filming and editing makeup videos as well as editing photos and graphics. In addition, Leonie supports the team in maintaining and further developing our website and newsletter.

Leonie enjoys photography and sewing in her free time. When she’s not being creative, she likes to spend time in the Black Forest.

Leonie’s favorite product: Eyeliner Stardust 124

COSLINE Team Luisa Bösch

online marketing

Luisa Bösch

Luisa is part of the online marketing team at COSLINE. Her responsibilities include creating content for our social media channels and shooting and editing our videos. She is also responsible for coming up with ideas for new campaigns and visualising them.

Luisa loves to travel and explore new places. After work, she likes to work out at the gym. She is also very interested in personal development and enjoys attending seminars and reading books on the topic of mindset.

Luisa's favorite product: Shiny Highlighter 601

COSLINE Melina

online marketing

Melina Schülli

Melina is part of the online marketing team at COSLINE. Her responsibilities include planning and executing campaigns, creating content for our social media channels, as well as filming and editing videos. She also takes care of photo editing and creating graphics.

In her free time, Melina finds the perfect balance by playing the piano. She is also regularly found at the gym, as exercise is part of her daily routine to clear her mind.

Melina's favorite product: Mascara Black Wonderlash 93

COSLINE Team Victoria Gosteva

online marketing

Victoria Gosteva

Victoria is part of the online marketing team at COSLINE. She is responsible for creating content for our social media channels, filming and editing our videos, and helping develop and visually implement new campaign ideas. She’s also in charge of image editing and graphic design.

In her free time, Victoria loves traveling to new destinations and embracing unexpected adventures. A good thriller is always a must. When she’s not giving it her all at the gym with strength training, she enjoys relaxing moments with friends.

Victoria's favorite product: Eyeshadow Muskat 304

COSLINE Nancy

Procurement

Nancy Steinberg

At Cosline, Nancy is responsible for purchasing, introducing new products, negotiating with suppliers, and building and optimizing processes. She makes sure your favorite products are always in stock and that we regularly offer exciting new additions to our range.

In her free time, Nancy enjoys spending time with her husband and their three children. Whether hiking or cycling in the Black Forest – she loves nature and outdoor activities. She’s also passionate about traveling and discovering new places, whether it’s a city trip, a beach vacation, or a mountain adventure.

Nancy’s favorite product: Magic Lipstick

COSLINE Team
COSLINE product range 2025

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