an alternative to intuition

You can present us with a practical problem. We discover a solution for it using math and simulations. At the project, you will also get a logical argumentation behind the solution.

We are a group of mathematicians and engineers who want to understand the cause-and-effect relationships that affect the world. Our goal is to help our customers make successful and well-informed decisions. For this purpose, we build simulation models describing our customers’ operating environments. They allow the short- and long-term consequences of decisions to be studied safely in a sandbox environment. It reduces decision-making uncertainty and reduces the risk of costly mistakes.

STE Foresight™

Mathematics and psychology to support decision making

STE FORESIGHT provides tools for management to solve vicious problems. It also helps to reduce uncertainty in decision-making.


STE Analytics is an independent company owned by its devoted employees.

Pekka Aarnisalo

Managing Partner & Co-Founder

Get to know pekka

Prior to founding STE Analytics, Pekka spent close to two decades in various positions at the management consultancy Systems Thinking Europe, a company using system dynamics to solve complex business issues. Before this, he worked at an analysis firm developing business simulation games  for various industries.


When not enthusiastically pursuing practical and elegant solutions to client conundrums, Mr Aarnisalo enjoys trekking, cooking and reading. He holds two M.Sc. degrees, in engineering and economics.

Pekka can be contacted by email at pekka.aarnisalo(a) or by phone at +358 44 5844831.

OSMO Salonen

Senior Consultant, Partner and Co-Founder


STE Analytics partner Osmo Salonen is an expert in simulation-based consulting services and currently serves as a senior consultant to the firm. Before co-founding the company, he worked for several years as a management consultant and data scientist for Systems Thinking Europe. His work experience also includes various management roles for an e-commerce company, and extensive experience in the commodity markets of industrial chemicals and consumer services.


Outside the office he is an enthusiastic photographer and plays several sports. Mr Salonen holds a M.Sc. degree in technology.

Osmo can be contacted by email at osmo.salonen(a) or by phone at +358 44 5727479.


Senior Consultant, Partner and Co-Founder

get to know nella

Nella Lehti is a senior consultant and co-founder of STE Analytics. She has several years of experience in consulting, model building and data analysis for the pulp, paper, board and sawn wood industries. Prior to her work at STE Analytics, she was employed at Systems Thinking Europe.


For her, a perfect day at the office entails juggling with the data at her computer until the practical causalities behind the numbers are revealed. In her free time she enjoys music, learning Japanese and walking in the woods. Ms Lehti holds a M.Sc. degree in applied mathematics.

Nella can be contacted by email at nella.lehti(a) or by phone at +358 44 5501876.

Tero Kaleva

Senior Adviser and Member of the Board

get to know tero

Tero Kaleva was appointed senior advisor and board member to STE Analytics after serving in the same positions at Systems Thinking Europe. Prior to this, he worked as a general manager and team leader at AEL, a Finnish technical training company, and its subsidiary in Shanghai, China. This was preceded by corporate administration and marketing positions in several Finnish paper industries and the Asian company, Sinar Mas. Mr Kaleva holds a M.Sc. degree in Forestry.


Tero can be contacted by email at tero.kaleva(a) or by phone at +358 50 5987019.

MINNA Soittila


get to know minna

Minna Soittila works as a consultant at STE Analytics. Ms Soittila has mostly worked with paper industry models. Prior to joining STE, she studied mathematics at the University of Helsinki, visual arts at the University of Lapland, and taught mathematics to high school students for a few years.

In modeling, Ms Soittila is particularly enthusiastic about the creativity required in the work. She also enjoys learning new things as the industry expertise is gathered to form a base for the modelling process. In her free time, she enjoys playing volleyball and doing many kinds of handicrafts. Ms Soittila holds a MSc in mathematics and MFA in visual arts education.

Minna can be contacted by email at
minna.soittila(at) or by phone at +358407662224.