Took a look at both portfolios. You have a nice amount of work and your work seems to be very consistent which is good.*
My first observation is that I would like to see you spend more time with each model and push it. From the outside you look to be cleanly getting to a finish, but the models are lacking a bit from FINISHING rather than pushing. for example I would like to see you spend time with different surfaces to sell the material indication through edge thickness what’s metal, whats composite material steel vs iron vs aluminum etc. A lot of your surfaces and details are pretty similar so sticking a thick material next to a thin material gives you a bit better contrast. Currently some of the designs feel more toy like because of the lack of this.
Try out Keyshot and show at least one uv textured model*
Are you looking for film work or game work? My suggestion would be to find some hard-surface work from a game or film and do a master study (Copy someones Concept) and really push yourself to match every surface thickness and pay a lot of attention to the small medium and high frequency detail and make sure there is a good sense of scale in each.
One of the best hard-surface designers I have ever worked with is George Hull! Take a look at these concepts below notice how there is a nice split between the size scale weight of the details. areas of detail areas of rest etc.*
One place this stands out in your own work is the hut scene where the leafy roofs are small and thin and add a lot of life to the scene. The trees look like you could have spent a few more hours to get them up to speed. If i had to guess your quick on getting FINiSHED which is a problem many artist actually have trouble with but for you I would say take more time you have the skill, just don’t get bored with it, find good reference and spend time with materials until they look like the material without a texture map
Here are some examples next to yours where you can see where edges, line, weight, details can help sell the scale or excitement of a piece*
Would love*to see any updates or new projects you start I think you have a lot of potential and would like to see you push yourself to reach it. I can give plenty of demo reel or portfolio advice but this would be the first step in that process. Please Keep me posted.