Senior SIM Expert (all)

1NCE; Germany (OH); On-site; USD 81,244 - 104,456; Full time

Benefits offered by this job

26 days of paid vacation

Professional development opportunities

Trust-based working hours

Modern office amenities

Subsidized Urban Sports Club membership

Nilo.Health platform for well-being

Job summary

A pioneering telecom company is seeking a Senior SIM Expert to manage SIM/eSIM profiles and lifecycle, ensuring compliance and overseeing vendor coordination. The ideal candidate has around 5 years in a similar role, solid telecom background, and is proficient in SIM troubleshooting and eSIM provisioning. This position can be onsite or hybrid, offering 26 days of vacation and a vibrant working environment with opportunities for professional growth.

Qualifications

• Around 5 years of experience in Engineering or Roaming roles.
• Strong IT skills with a background in telecom.
• Experience with OTA systems maintenance preferred.

Responsibilities

• Manage SIM/eSIM profile and lifecycle.
• Coordinate with vendors and document processes.
• Contribute to development projects related to SIM functionalities.

Skills

Electrical Engineering

Telecom experience

SIM troubleshooting

eSIM provisioning

Multi-IMSI applications

Team collaboration

Education

Completed studies in Electrical Engineering or related field

Tools

Wireshark

Job description

1NCE is a pioneering company at the forefront of reshaping the IoT connectivity landscape. As a key player in the industry, we are on a mission to change the telecoms/IoT landscape with a focus on innovation, customer satisfaction, and industry leadership.

Your Team

Become an important part of 1NCE as Senior SIM Expert (all) and work directly with our entire technical team. We are looking for real “doers” with a positive drive and energy who complement our team in the best possible way and who enjoy mastering challenges and growing together with us. This position is based in Cologne and can be done onsite or hybrid.

Your Mission

• SIM/eSIM profile management: Ensure correct parametrization of SIMs in compliance with GSMA and 3GPP specifications to guarantee seamless interaction between SIM, device, and network.
• SIM lifecycle ownership: Oversee the entire SIM lifecycle process, from requirement engineering through to operational management.
• Vendor coordination: Act as the primary interface to SIM and OTA vendors, standardizing SIM‑related procedures across all partners.
• Process documentation: Create and maintain clear documentation of technical processes to ensure consistency and transparency.
• Project participation: Contribute to development projects that are connected to or reliant on SIM/OTA functionalities.
• SIM customization and maintenance: Manage SIM customization, ongoing maintenance, and reprogramming to support operational needs.
• Additional responsibilities: Handle handset interaction tracing, AuC security policy, and OTA‑related processes.

Your Skills

• Educational background: Completed studies in Electrical Engineering, Technical Computer Science, or a related field of education.
• Professional experience: Approximately 5 years in a similar role, such as Engineering or Roaming.
• Technical and administrative skills: Strong administrative and IT abilities with a solid background in the telecom industry.
• SIM troubleshooting expertise: Skilled in SIM card troubleshooting, including the ability to perform SIM, Wireshark, and network traces, provision SIMs, and change IMSIs.
• eSIM provisioning knowledge: Experienced in eSIM Remote SIM provisioning following GSMA SGP 01/02 standards.
• Multi‑IMSI familiarity: Proficient in working with multi‑IMSI applications and creating or updating related procedures.
• Vendor coordination: Capable of liaising effectively with SIM vendors in collaboration with managers.
• OTA systems maintenance: Experienced in maintaining OTA systems (preferred, though training can be provided if needed).
• HLR knowledge: Able to perform basic checks on an HLR for SIM card provisioning.
• Work approach: Self‑starter mentality, proactive, and confident in taking initiative.
• Team and customer orientation: Strong team player with a customer‑focused mindset and a confident, competent professional appearance.

Your Gains

• 26 days of paid vacation per year
• Further professional development – become part of our international team in an exciting environment that will revolutionise the telecommunications market for IoT
• An exciting environment that will revolutionise the mobile market for IoT with simplicity
• Varied, agile work in a young company with an international team where fun is not neglected
• Short decision‑making paths and plenty of room for manoeuvre – you can really get involved and help shape the future
• Trust‑based working hours, laptop, mobile phone and the option to work remotely
• Modern office in a central location with drinks, fruit, office snacks, subsidised Urban Sports Club membership and excellent public transport connections
• Nilo.Health platform for your well‑being

Your Contact

Vladimir Kaiser
[e-mail]

About Us

1NCE is set to change the IoT connectivity market forever. This requires courage, creativity and a unique team with special skills. Are you ready to join us in shaping the future of the IoT? 1NCE offers you unique career opportunities in one of the fastest growing markets in the world.

Equal Employment Opportunity Statement

1NCE is committed to providing equal employment opportunities to all individuals regardless of race, color, religion, gender, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other legally protected status. We value diversity, inclusion and equity, and believe that a diverse and inclusive workforce is a key driver of our success. We strive to create a workplace where everyone feels valued, respected and empowered to bring their full, authentic selves to work. We are dedicated to providing a fair and equitable hiring process that ensures all candidates are evaluated based on their qualifications, skills and experience without bias or discrimination.