About us
We have built business spreadsheets since 2011. We help companies keep their calculations understandable, verifiable and ready for future changes.
Excel expertise grounded in business use
Fixcelo is a service of Surman s.r.o. Our work draws on Jaroslav Surman’s 30 years of experience with Excel. We understand formulas and the demands placed on workbooks used for pricing, planning and regular reporting.
From assessment to improvement
We review existing workbooks, repair formulas and macros, document calculations and plan further development. We work with VBA, Python, Power Query, Power BI and databases, selecting the approach to suit the assignment and your environment.
Responsibility for your assignment
Assignments are led by Jaroslav Surman, managing director of Surman s.r.o. We communicate in Czech, English and German. Scope, pricing and delivery arrangements are agreed in advance.
Information security
Jaroslav Surman holds the personal ISO/IEC 27001 Lead Implementer certification from PECB. We use agreed transfer procedures, local analysis and defined retention and deletion rules for working data.
Jaroslav Surman’s personal certification
- 2026 ISO/IEC 27001 Lead Implementer PECB